All airlines flying from Denver (DEN) to Washington Dulles (IAD).

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FLIGHT SCHEDULE
Direct Flights:
Tue 09:50 Denver (DEN) 15:13 Washington Dulles (IAD) United Airlines UA 2087 Non-stop Airbus A321neo (32Q) 3:23 Operates only on 2026-01-06
Daily 09:50 Denver (DEN) 15:12 Washington Dulles (IAD) United Airlines UA 2087 Non-stop Boeing 737 MAX 9 (7M9) 3:22 Effective 2026-01-07 through 2026-02-10
Wed 09:50 Denver (DEN) 15:13 Washington Dulles (IAD) United Airlines UA 2087 Non-stop Airbus A321neo (32Q) 3:23 Operates only on 2026-02-11
Daily 10:15 Denver (DEN) 15:34 Washington Dulles (IAD) United Airlines UA 2087 Non-stop Boeing 777 (777) 3:19 Valid until 2026-01-05
Daily 10:15 Denver (DEN) 15:45 Washington Dulles (IAD) United Airlines UA 2087 Non-stop Boeing 757-300 (753) 3:30 Effective 2026-03-29 through 2026-04-29
Daily 10:20 Denver (DEN) 15:44 Washington Dulles (IAD) United Airlines UA 2087 Non-stop Boeing 757-300 (753) 3:24 Effective 2026-02-12 through 2026-03-04
Daily 10:25 Denver (DEN) 15:50 Washington Dulles (IAD) United Airlines UA 2087 Non-stop Boeing 757-300 (753) 3:25 Effective from 2026-04-30
Mon-Fri 16:45 Denver (DEN) 21:55 Washington Dulles (IAD) Southwest Airlines WN 2135 Non-stop Boeing 737 MAX 8 (7M8) 3:10 Effective 2026-01-06 through 2026-01-14
Tue-Fri,Sun 16:45 Denver (DEN) 21:55 Washington Dulles (IAD) Southwest Airlines WN 2135 Non-stop Boeing 737 MAX 8 (7M8) 3:10 Effective 2026-01-18 through 2026-01-23
Mon-Fri 16:45 Denver (DEN) 21:55 Washington Dulles (IAD) Southwest Airlines WN 2135 Non-stop Boeing 737 MAX 8 (7M8) 3:10 Effective 2026-01-26 through 2026-02-04
Tue,Wed,Sun 16:45 Denver (DEN) 21:55 Washington Dulles (IAD) Southwest Airlines WN 2135 Non-stop Boeing 737 MAX 8 (7M8) 3:10 Effective 2026-02-08 through 2026-02-11
Tue,Wed 16:45 Denver (DEN) 21:55 Washington Dulles (IAD) Southwest Airlines WN 2135 Non-stop Boeing 737 MAX 8 (7M8) 3:10 Effective 2026-02-18 through 2026-03-04
Sat 17:00 Denver (DEN) 22:10 Washington Dulles (IAD) Southwest Airlines WN 2135 Non-stop Boeing 737 MAX 8 (7M8) 3:10 Effective 2026-01-10 through 2026-02-07
Thu,Fri,Sun 17:25 Denver (DEN) 22:40 Washington Dulles (IAD) Southwest Airlines WN 2135 Non-stop Boeing 737 MAX 8 (7M8) 3:15 Effective 2026-01-11 through 2026-01-16
Mon,Sun 17:25 Denver (DEN) 22:40 Washington Dulles (IAD) Southwest Airlines WN 2135 Non-stop Boeing 737 MAX 8 (7M8) 3:15 Effective 2026-01-19 through 2026-01-25
Thu,Fri,Sun 17:25 Denver (DEN) 22:40 Washington Dulles (IAD) Southwest Airlines WN 2135 Non-stop Boeing 737 MAX 8 (7M8) 3:15 Effective 2026-02-01 through 2026-02-06
Mon,Sun 17:25 Denver (DEN) 22:40 Washington Dulles (IAD) Southwest Airlines WN 2135 Non-stop Boeing 737 MAX 8 (7M8) 3:15 Effective 2026-02-09 through 2026-02-15
Mon,Tue,Thu 17:25 Denver (DEN) 22:40 Washington Dulles (IAD) Southwest Airlines WN 2135 Non-stop Boeing 737 MAX 8 (7M8) 3:15 Effective 2026-02-17 through 2026-02-23
Mon 17:25 Denver (DEN) 22:40 Washington Dulles (IAD) Southwest Airlines WN 2135 Non-stop Boeing 737 MAX 8 (7M8) 3:15 Operates only on 2026-03-02
Mon,Thu,Fri 17:50 Denver (DEN) 23:10 Washington Dulles (IAD) Southwest Airlines WN 2135 Non-stop Boeing 737 MAX 8 (7M8) 3:20 Effective 2026-02-12 through 2026-02-16
Thu,Fri,Sun 17:50 Denver (DEN) 23:10 Washington Dulles (IAD) Southwest Airlines WN 2135 Non-stop Boeing 737 MAX 8 (7M8) 3:20 Effective 2026-02-20 through 2026-03-01
Daily 17:55 Denver (DEN) 23:13 Washington Dulles (IAD) United Airlines UA 2408 Non-stop Airbus A321neo (32Q) 3:18 Effective 2026-04-30 through 2026-05-20
Daily 17:55 Denver (DEN) 23:13 Washington Dulles (IAD) United Airlines UA 2408 Non-stop Boeing 737-900 (739) 3:18 Effective from 2026-05-21
Mon-Fri,Sun 17:58 Denver (DEN) 23:19 Washington Dulles (IAD) United Airlines UA 2408 Non-stop Airbus A321neo (32Q) 3:21 Effective 2026-02-12 through 2026-03-04
Sat 17:58 Denver (DEN) 23:18 Washington Dulles (IAD) United Airlines UA 2408 Non-stop Boeing 737-900 (739) 3:20 Effective 2026-02-14 through 2026-02-28
Daily 17:59 Denver (DEN) 23:22 Washington Dulles (IAD) United Airlines UA 2408 Non-stop Airbus A321neo (32Q) 3:23 Effective 2026-01-06 through 2026-02-11
Daily 17:59 Denver (DEN) 23:20 Washington Dulles (IAD) United Airlines UA 2408 Non-stop Airbus A321neo (32Q) 3:21 Effective 2026-03-05 through 2026-03-28
Daily 17:59 Denver (DEN) 23:34 Washington Dulles (IAD) United Airlines UA 2408 Non-stop Airbus A321neo (32Q) 3:35 Effective 2026-03-29 through 2026-04-29
Daily 18:00 Denver (DEN) 23:23 Washington Dulles (IAD) United Airlines UA 2408 Non-stop Airbus A321neo (32Q) 3:23 Valid until 2026-01-05
Mon 13:55 Denver (DEN) 19:05 Washington Dulles (IAD) Southwest Airlines WN 2474 Non-stop Boeing 737 MAX 8 (7M8) 3:10 Operates only on 2026-01-05
Mon,Tue,Fri,Sun 14:00 Denver (DEN) 19:10 Washington Dulles (IAD) Southwest Airlines WN 2474 Non-stop Boeing 737-800 (73H) 3:10 Valid until 2026-01-04
Daily 19:05 Denver (DEN) 00:32 Washington Dulles (IAD) United Airlines UA 2477 Non-stop Boeing 737-900 (739) 3:27 Effective 2026-05-21 through 2026-08-17 The flight arrives 1 day after departure.
Sat 18:25 Denver (DEN) 23:55 Washington Dulles (IAD) Southwest Airlines WN 2620 Non-stop Boeing 737 MAX 8 (7M8) 3:30 Effective 2026-06-06 through 2026-08-01
Mon,Thu,Fri,Sun 19:05 Denver (DEN) 00:30 Washington Dulles (IAD) Southwest Airlines WN 2620 Non-stop Boeing 737 MAX 8 (7M8) 3:25 Effective 2026-06-04 through 2026-08-03 The flight arrives 1 day after departure.
Tue,Wed 19:25 Denver (DEN) 00:50 Washington Dulles (IAD) Southwest Airlines WN 2620 Non-stop Boeing 737 MAX 8 (7M8) 3:25 Effective 2026-06-09 through 2026-07-29 The flight arrives 1 day after departure.
Sat 16:35 Denver (DEN) 21:45 Washington Dulles (IAD) Southwest Airlines WN 2658 Non-stop Boeing 737 MAX 8 (7M8) 3:10 Effective 2026-02-14 through 2026-02-28
Mon,Thu,Fri 10:15 Denver (DEN) 15:45 Washington Dulles (IAD) Southwest Airlines WN 3437 Non-stop Boeing 737-800 (73H) 3:30 Effective 2026-06-04 through 2026-08-03
Tue,Wed 10:45 Denver (DEN) 16:05 Washington Dulles (IAD) Southwest Airlines WN 3437 Non-stop Boeing 737 MAX 8 (7M8) 3:20 Effective 2026-06-09 through 2026-07-29
Sat,Sun 10:50 Denver (DEN) 16:05 Washington Dulles (IAD) Southwest Airlines WN 3437 Non-stop Boeing 737 MAX 8 (7M8) 3:15 Effective 2026-06-06 through 2026-08-02
Wed,Thu 10:30 Denver (DEN) 15:45 Washington Dulles (IAD) Southwest Airlines WN 3567 Non-stop Boeing 737 MAX 8 (7M8) 3:15 Valid until 2026-01-01
Mon 18:15 Denver (DEN) 23:30 Washington Dulles (IAD) Southwest Airlines WN 3567 Non-stop Boeing 737 MAX 8 (7M8) 3:15 Operates only on 2026-01-05
Tue,Wed 18:35 Denver (DEN) 23:40 Washington Dulles (IAD) Southwest Airlines WN 3758 Non-stop Boeing 737 MAX 8 (7M8) 3:05 Effective 2026-03-10 through 2026-04-01
Mon,Thu,Fri,Sun 19:05 Denver (DEN) 00:15 Washington Dulles (IAD) Southwest Airlines WN 3758 Non-stop Boeing 737 MAX 8 (7M8) 3:10 Effective 2026-03-05 through 2026-04-06 The flight arrives 1 day after departure.
Sat 19:15 Denver (DEN) 00:25 Washington Dulles (IAD) Southwest Airlines WN 3758 Non-stop Boeing 737 MAX 8 (7M8) 3:10 Effective 2026-03-07 through 2026-04-04 The flight arrives 1 day after departure.
Mon,Thu,Fri 09:30 Denver (DEN) 14:45 Washington Dulles (IAD) Southwest Airlines WN 4330 Non-stop Boeing 737 MAX 8 (7M8) 3:15 Effective 2026-02-12 through 2026-02-16
Fri,Sun 09:30 Denver (DEN) 14:45 Washington Dulles (IAD) Southwest Airlines WN 4330 Non-stop Boeing 737 MAX 8 (7M8) 3:15 Effective 2026-02-20 through 2026-02-22
Thu,Fri,Sun 09:30 Denver (DEN) 14:45 Washington Dulles (IAD) Southwest Airlines WN 4330 Non-stop Boeing 737-800 (73H) 3:15 Effective 2026-02-26 through 2026-03-01
Mon-Fri 10:35 Denver (DEN) 15:50 Washington Dulles (IAD) Southwest Airlines WN 4330 Non-stop Boeing 737-800 (73H) 3:15 Effective 2026-01-06 through 2026-01-14
Tue-Fri,Sun 10:35 Denver (DEN) 15:50 Washington Dulles (IAD) Southwest Airlines WN 4330 Non-stop Boeing 737-800 (73H) 3:15 Effective 2026-01-18 through 2026-01-23
Mon-Fri 10:35 Denver (DEN) 15:50 Washington Dulles (IAD) Southwest Airlines WN 4330 Non-stop Boeing 737-800 (73H) 3:15 Effective 2026-01-26 through 2026-02-04

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Parallax here DEN-IAD

1 2 3 4 5 6 7 8

A domestic route departing from the Denver airport (DEN) and arriving at Washington Dulles airport (IAD).
The flight distance is 1448 miles, or 2331 km.
The timezone of the departure airport is UTC-7 , and the timezone of the arrival airport is UTC-5 . Current time at the point of departure is (loading...), and (loading...) at the point of arrival. There is a (loading...) hour time difference between the airports.
For direct flights, the flight time varies between 3:05 and 3:35.

Return (IAD-DEN) flights

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All airlines flying from Denver (DEN) to Washington Dulles (IAD).

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FLIGHT SCHEDULE

Direct Flights:

United Airlines UA2087

09:50

Denver (DEN)

15:13

Washington Dulles (IAD)

Operates only on 2026-01-06

Mon
-

Tue

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 3:23, non-stop
Airbus A321neo (32Q)

Direct Flights:

United Airlines UA2087

09:50

Denver (DEN)

15:12

Washington Dulles (IAD)

Effective 2026-01-07 through 2026-02-10

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 3:22, non-stop
Boeing 737 MAX 9 (7M9)

Direct Flights:

United Airlines UA2087

09:50

Denver (DEN)

15:13

Washington Dulles (IAD)

Operates only on 2026-02-11

Mon
-

Tue
-

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 3:23, non-stop
Airbus A321neo (32Q)

Direct Flights:

United Airlines UA2087

10:15

Denver (DEN)

15:34

Washington Dulles (IAD)

Valid until 2026-01-05

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 3:19, non-stop
Boeing 777 (777)

Direct Flights:

United Airlines UA2087

10:15

Denver (DEN)

15:45

Washington Dulles (IAD)

Effective 2026-03-29 through 2026-04-29

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 3:30, non-stop
Boeing 757-300 (753)

Direct Flights:

United Airlines UA2087

10:20

Denver (DEN)

15:44

Washington Dulles (IAD)

Effective 2026-02-12 through 2026-03-04

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 3:24, non-stop
Boeing 757-300 (753)

Direct Flights:

United Airlines UA2087

10:25

Denver (DEN)

15:50

Washington Dulles (IAD)

Effective from 2026-04-30

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 3:25, non-stop
Boeing 757-300 (753)

Direct Flights:

Southwest Airlines WN2135

16:45

Denver (DEN)

21:55

Washington Dulles (IAD)

Effective 2026-01-06 through 2026-01-14

Mon

Tue

Wed

Thu

Fri

Sat
-

Sun
-

Duration: 3:10, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN2135

16:45

Denver (DEN)

21:55

Washington Dulles (IAD)

Effective 2026-01-18 through 2026-01-23

Mon
-

Tue

Wed

Thu

Fri

Sat
-

Sun

Duration: 3:10, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN2135

16:45

Denver (DEN)

21:55

Washington Dulles (IAD)

Effective 2026-01-26 through 2026-02-04

Mon

Tue

Wed

Thu

Fri

Sat
-

Sun
-

Duration: 3:10, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN2135

16:45

Denver (DEN)

21:55

Washington Dulles (IAD)

Effective 2026-02-08 through 2026-02-11

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:10, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN2135

16:45

Denver (DEN)

21:55

Washington Dulles (IAD)

Effective 2026-02-18 through 2026-03-04

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 3:10, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN2135

17:00

Denver (DEN)

22:10

Washington Dulles (IAD)

Effective 2026-01-10 through 2026-02-07

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:10, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN2135

17:25

Denver (DEN)

22:40

Washington Dulles (IAD)

Effective 2026-01-11 through 2026-01-16

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 3:15, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN2135

17:25

Denver (DEN)

22:40

Washington Dulles (IAD)

Effective 2026-01-19 through 2026-01-25

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:15, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN2135

17:25

Denver (DEN)

22:40

Washington Dulles (IAD)

Effective 2026-02-01 through 2026-02-06

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 3:15, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN2135

17:25

Denver (DEN)

22:40

Washington Dulles (IAD)

Effective 2026-02-09 through 2026-02-15

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:15, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN2135

17:25

Denver (DEN)

22:40

Washington Dulles (IAD)

Effective 2026-02-17 through 2026-02-23

Mon

Tue

Wed
-

Thu

Fri
-

Sat
-

Sun
-

Duration: 3:15, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN2135

17:25

Denver (DEN)

22:40

Washington Dulles (IAD)

Operates only on 2026-03-02

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 3:15, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN2135

17:50

Denver (DEN)

23:10

Washington Dulles (IAD)

Effective 2026-02-12 through 2026-02-16

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 3:20, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN2135

17:50

Denver (DEN)

23:10

Washington Dulles (IAD)

Effective 2026-02-20 through 2026-03-01

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 3:20, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

United Airlines UA2408

17:55

Denver (DEN)

23:13

Washington Dulles (IAD)

Effective 2026-04-30 through 2026-05-20

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 3:18, non-stop
Airbus A321neo (32Q)

Direct Flights:

United Airlines UA2408

17:55

Denver (DEN)

23:13

Washington Dulles (IAD)

Effective from 2026-05-21

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 3:18, non-stop
Boeing 737-900 (739)

Direct Flights:

United Airlines UA2408

17:58

Denver (DEN)

23:19

Washington Dulles (IAD)

Effective 2026-02-12 through 2026-03-04

Mon

Tue

Wed

Thu

Fri

Sat
-

Sun

Duration: 3:21, non-stop
Airbus A321neo (32Q)

Direct Flights:

United Airlines UA2408

17:58

Denver (DEN)

23:18

Washington Dulles (IAD)

Effective 2026-02-14 through 2026-02-28

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:20, non-stop
Boeing 737-900 (739)

Direct Flights:

United Airlines UA2408

17:59

Denver (DEN)

23:22

Washington Dulles (IAD)

Effective 2026-01-06 through 2026-02-11

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 3:23, non-stop
Airbus A321neo (32Q)

Direct Flights:

United Airlines UA2408

17:59

Denver (DEN)

23:20

Washington Dulles (IAD)

Effective 2026-03-05 through 2026-03-28

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 3:21, non-stop
Airbus A321neo (32Q)

Direct Flights:

United Airlines UA2408

17:59

Denver (DEN)

23:34

Washington Dulles (IAD)

Effective 2026-03-29 through 2026-04-29

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 3:35, non-stop
Airbus A321neo (32Q)

Direct Flights:

United Airlines UA2408

18:00

Denver (DEN)

23:23

Washington Dulles (IAD)

Valid until 2026-01-05

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 3:23, non-stop
Airbus A321neo (32Q)

Direct Flights:

Southwest Airlines WN2474

13:55

Denver (DEN)

19:05

Washington Dulles (IAD)

Operates only on 2026-01-05

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 3:10, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN2474

14:00

Denver (DEN)

19:10

Washington Dulles (IAD)

Valid until 2026-01-04

Mon

Tue

Wed
-

Thu
-

Fri

Sat
-

Sun

Duration: 3:10, non-stop
Boeing 737-800 (73H)

Direct Flights:

United Airlines UA2477

19:05

Denver (DEN)

00:32(+1)

Washington Dulles (IAD)

Effective 2026-05-21 through 2026-08-17

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 3:27, non-stop
Boeing 737-900 (739)
The flight arrives 1 day after departure.

Direct Flights:

Southwest Airlines WN2620

18:25

Denver (DEN)

23:55

Washington Dulles (IAD)

Effective 2026-06-06 through 2026-08-01

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:30, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN2620

19:05

Denver (DEN)

00:30(+1)

Washington Dulles (IAD)

Effective 2026-06-04 through 2026-08-03

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 3:25, non-stop
Boeing 737 MAX 8 (7M8)
The flight arrives 1 day after departure.

Direct Flights:

Southwest Airlines WN2620

19:25

Denver (DEN)

00:50(+1)

Washington Dulles (IAD)

Effective 2026-06-09 through 2026-07-29

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 3:25, non-stop
Boeing 737 MAX 8 (7M8)
The flight arrives 1 day after departure.

Direct Flights:

Southwest Airlines WN2658

16:35

Denver (DEN)

21:45

Washington Dulles (IAD)

Effective 2026-02-14 through 2026-02-28

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:10, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3437

10:15

Denver (DEN)

15:45

Washington Dulles (IAD)

Effective 2026-06-04 through 2026-08-03

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 3:30, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3437

10:45

Denver (DEN)

16:05

Washington Dulles (IAD)

Effective 2026-06-09 through 2026-07-29

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 3:20, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3437

10:50

Denver (DEN)

16:05

Washington Dulles (IAD)

Effective 2026-06-06 through 2026-08-02

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun

Duration: 3:15, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3567

10:30

Denver (DEN)

15:45

Washington Dulles (IAD)

Valid until 2026-01-01

Mon
-

Tue
-

Wed

Thu

Fri
-

Sat
-

Sun
-

Duration: 3:15, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3567

18:15

Denver (DEN)

23:30

Washington Dulles (IAD)

Operates only on 2026-01-05

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 3:15, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3758

18:35

Denver (DEN)

23:40

Washington Dulles (IAD)

Effective 2026-03-10 through 2026-04-01

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 3:05, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3758

19:05

Denver (DEN)

00:15(+1)

Washington Dulles (IAD)

Effective 2026-03-05 through 2026-04-06

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 3:10, non-stop
Boeing 737 MAX 8 (7M8)
The flight arrives 1 day after departure.

Direct Flights:

Southwest Airlines WN3758

19:15

Denver (DEN)

00:25(+1)

Washington Dulles (IAD)

Effective 2026-03-07 through 2026-04-04

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:10, non-stop
Boeing 737 MAX 8 (7M8)
The flight arrives 1 day after departure.

Direct Flights:

Southwest Airlines WN4330

09:30

Denver (DEN)

14:45

Washington Dulles (IAD)

Effective 2026-02-12 through 2026-02-16

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 3:15, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4330

09:30

Denver (DEN)

14:45

Washington Dulles (IAD)

Effective 2026-02-20 through 2026-02-22

Mon
-

Tue
-

Wed
-

Thu
-

Fri

Sat
-

Sun

Duration: 3:15, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4330

09:30

Denver (DEN)

14:45

Washington Dulles (IAD)

Effective 2026-02-26 through 2026-03-01

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 3:15, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN4330

10:35

Denver (DEN)

15:50

Washington Dulles (IAD)

Effective 2026-01-06 through 2026-01-14

Mon

Tue

Wed

Thu

Fri

Sat
-

Sun
-

Duration: 3:15, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN4330

10:35

Denver (DEN)

15:50

Washington Dulles (IAD)

Effective 2026-01-18 through 2026-01-23

Mon
-

Tue

Wed

Thu

Fri

Sat
-

Sun

Duration: 3:15, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN4330

10:35

Denver (DEN)

15:50

Washington Dulles (IAD)

Effective 2026-01-26 through 2026-02-04

Mon

Tue

Wed

Thu

Fri

Sat
-

Sun
-

Duration: 3:15, non-stop
Boeing 737-800 (73H)

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A domestic route departing from the Denver airport (DEN) and arriving at Washington Dulles airport (IAD).
The flight distance is 1448 miles, or 2331 km.
The timezone of the departure airport is UTC-7 , and the timezone of the arrival airport is UTC-5 . Current time at the point of departure is (loading...), and (loading...) at the point of arrival. There is a (loading...) hour time difference between the airports.
For direct flights, the flight time varies between 3:05 and 3:35.

Return (IAD-DEN) flights

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