United Airlines flights from Denver (DEN) to Washington Dulles (IAD).

FLIGHT SCHEDULE
Direct Flights:
Daily 06:00 Denver (DEN) 11:14 Washington Dulles (IAD) United Airlines UA 1279 Non-stop Boeing 737-900 (739) 3:14 Effective 2026-04-30 through 2026-10-24
Mon,Thu,Fri 06:10 Denver (DEN) 11:30 Washington Dulles (IAD) United Airlines UA 1279 Non-stop Boeing 757-200 (752) 3:20 Effective 2026-03-05 through 2026-03-13
Sat 06:10 Denver (DEN) 11:32 Washington Dulles (IAD) United Airlines UA 1279 Non-stop Airbus A321neo (32Q) 3:22 Operates only on 2026-03-07
Sun 06:10 Denver (DEN) 11:30 Washington Dulles (IAD) United Airlines UA 1279 Non-stop Boeing 737-900 (739) 3:20 Effective 2026-03-08 through 2026-03-22
Mon,Thu-Sat 06:10 Denver (DEN) 11:30 Washington Dulles (IAD) United Airlines UA 1279 Non-stop Boeing 757-200 (752) 3:20 Effective 2026-03-14 through 2026-03-28
Daily 11:15 Denver (DEN) 16:46 Washington Dulles (IAD) United Airlines UA 1877 Non-stop Boeing 737 MAX 9 (7M9) 3:31 Effective 2026-03-29 through 2026-04-29
Daily 11:15 Denver (DEN) 16:42 Washington Dulles (IAD) United Airlines UA 1877 Non-stop Boeing 737-900 (739) 3:27 Effective 2026-06-25 through 2026-08-17
Daily 11:15 Denver (DEN) 16:40 Washington Dulles (IAD) United Airlines UA 1877 Non-stop Boeing 757-300 (753) 3:25 Effective from 2026-10-25
Daily 11:22 Denver (DEN) 16:47 Washington Dulles (IAD) United Airlines UA 1877 Non-stop Boeing 737 MAX 9 (7M9) 3:25 Effective 2026-04-30 through 2026-05-20
Daily 23:50 Denver (DEN) 05:08 Washington Dulles (IAD) United Airlines UA 1924 Non-stop Boeing 737-900 (739) 3:18 Effective from 2026-04-30 The flight arrives 1 day after departure.
Daily 23:59 Denver (DEN) 05:19 Washington Dulles (IAD) United Airlines UA 1924 Non-stop Boeing 777 (777) 3:20 Valid until 2026-01-05 The flight arrives 1 day after departure.
Mon,Wed-Sun 23:59 Denver (DEN) 05:21 Washington Dulles (IAD) United Airlines UA 1924 Non-stop Boeing 737-900 (739) 3:22 Effective 2026-01-07 through 2026-02-06 The flight arrives 1 day after departure.
Sat 23:59 Denver (DEN) 05:21 Washington Dulles (IAD) United Airlines UA 1924 Non-stop Boeing 737 MAX 9 (7M9) 3:22 Operates only on 2026-02-07 The flight arrives 1 day after departure.
Mon,Wed,Sun 23:59 Denver (DEN) 05:21 Washington Dulles (IAD) United Airlines UA 1924 Non-stop Boeing 737-900 (739) 3:22 Effective 2026-02-08 through 2026-02-11 The flight arrives 1 day after departure.
Mon,Wed-Sun 23:59 Denver (DEN) 05:18 Washington Dulles (IAD) United Airlines UA 1924 Non-stop Airbus A321neo (32Q) 3:19 Effective 2026-02-12 through 2026-03-04 The flight arrives 1 day after departure.
Wed-Fri,Sun 23:59 Denver (DEN) 05:17 Washington Dulles (IAD) United Airlines UA 1924 Non-stop Boeing 737-900 (739) 3:18 Effective 2026-03-05 through 2026-03-27 The flight arrives 1 day after departure.
Sat 23:59 Denver (DEN) 06:17 Washington Dulles (IAD) United Airlines UA 1924 Non-stop Boeing 737 MAX 9 (7M9) 3:18 Operates only on 2026-03-07 The flight arrives 1 day after departure.
Mon,Tue 23:59 Denver (DEN) 05:17 Washington Dulles (IAD) United Airlines UA 1924 Non-stop Boeing 757-200 (752) 3:18 Effective 2026-03-09 through 2026-03-24 The flight arrives 1 day after departure.
Sat 23:59 Denver (DEN) 05:17 Washington Dulles (IAD) United Airlines UA 1924 Non-stop Boeing 737 MAX 9 (7M9) 3:18 Effective 2026-03-14 through 2026-03-28 The flight arrives 1 day after departure.
Daily 23:59 Denver (DEN) 05:27 Washington Dulles (IAD) United Airlines UA 1924 Non-stop Boeing 737 MAX 9 (7M9) 3:28 Effective 2026-03-29 through 2026-04-29 The flight arrives 1 day after departure.
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
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
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.
Non-Direct Flights:
Mon,Thu,Fri 07:45 Denver (DEN) 16:30 Washington Dulles (IAD) United Airlines UA 326 1-stop Boeing 737-800 (738) 6:45 Effective 2026-02-12 through 2026-03-02
Sat 07:45 Denver (DEN) 16:30 Washington Dulles (IAD) United Airlines UA 326 1-stop Boeing 737 MAX 8 (7M8) 6:45 Effective 2026-02-14 through 2026-02-28
Sun 07:45 Denver (DEN) 16:30 Washington Dulles (IAD) United Airlines UA 326 1-stop Boeing 737 MAX 8 (7M8) 6:45 Effective 2026-02-15 through 2026-03-01
Daily 15:20 Denver (DEN) 00:15 Washington Dulles (IAD) United Airlines UA 1023 1-stop Airbus A321neo (32Q) 6:55 Valid until 2026-01-05 The flight arrives 1 day after departure.

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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 3:14 and 3:35.

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United Airlines flights from Denver (DEN) to Washington Dulles (IAD).

FLIGHT SCHEDULE

Direct Flights:

United Airlines UA1279

06:00

Denver (DEN)

11:14

Washington Dulles (IAD)

Effective 2026-04-30 through 2026-10-24

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 3:14, non-stop
Boeing 737-900 (739)

Direct Flights:

United Airlines UA1279

06:10

Denver (DEN)

11:30

Washington Dulles (IAD)

Effective 2026-03-05 through 2026-03-13

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 3:20, non-stop
Boeing 757-200 (752)

Direct Flights:

United Airlines UA1279

06:10

Denver (DEN)

11:32

Washington Dulles (IAD)

Operates only on 2026-03-07

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:22, non-stop
Airbus A321neo (32Q)

Direct Flights:

United Airlines UA1279

06:10

Denver (DEN)

11:30

Washington Dulles (IAD)

Effective 2026-03-08 through 2026-03-22

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

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

Direct Flights:

United Airlines UA1279

06:10

Denver (DEN)

11:30

Washington Dulles (IAD)

Effective 2026-03-14 through 2026-03-28

Mon

Tue
-

Wed
-

Thu

Fri

Sat

Sun
-

Duration: 3:20, non-stop
Boeing 757-200 (752)

Direct Flights:

United Airlines UA1877

11:15

Denver (DEN)

16:46

Washington Dulles (IAD)

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

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 3:31, non-stop
Boeing 737 MAX 9 (7M9)

Direct Flights:

United Airlines UA1877

11:15

Denver (DEN)

16:42

Washington Dulles (IAD)

Effective 2026-06-25 through 2026-08-17

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 3:27, non-stop
Boeing 737-900 (739)

Direct Flights:

United Airlines UA1877

11:15

Denver (DEN)

16:40

Washington Dulles (IAD)

Effective from 2026-10-25

Mon

Tue

Wed

Thu

Fri

Sat

Sun

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

Direct Flights:

United Airlines UA1877

11:22

Denver (DEN)

16:47

Washington Dulles (IAD)

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

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 3:25, non-stop
Boeing 737 MAX 9 (7M9)

Direct Flights:

United Airlines UA1924

23:50

Denver (DEN)

05:08(+1)

Washington Dulles (IAD)

Effective from 2026-04-30

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 3:18, non-stop
Boeing 737-900 (739)
The flight arrives 1 day after departure.

Direct Flights:

United Airlines UA1924

23:59

Denver (DEN)

05:19(+1)

Washington Dulles (IAD)

Valid until 2026-01-05

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 3:20, non-stop
Boeing 777 (777)
The flight arrives 1 day after departure.

Direct Flights:

United Airlines UA1924

23:59

Denver (DEN)

05:21(+1)

Washington Dulles (IAD)

Effective 2026-01-07 through 2026-02-06

Mon

Tue
-

Wed

Thu

Fri

Sat

Sun

Duration: 3:22, non-stop
Boeing 737-900 (739)
The flight arrives 1 day after departure.

Direct Flights:

United Airlines UA1924

23:59

Denver (DEN)

05:21(+1)

Washington Dulles (IAD)

Operates only on 2026-02-07

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:22, non-stop
Boeing 737 MAX 9 (7M9)
The flight arrives 1 day after departure.

Direct Flights:

United Airlines UA1924

23:59

Denver (DEN)

05:21(+1)

Washington Dulles (IAD)

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

Mon

Tue
-

Wed

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:22, non-stop
Boeing 737-900 (739)
The flight arrives 1 day after departure.

Direct Flights:

United Airlines UA1924

23:59

Denver (DEN)

05:18(+1)

Washington Dulles (IAD)

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

Mon

Tue
-

Wed

Thu

Fri

Sat

Sun

Duration: 3:19, non-stop
Airbus A321neo (32Q)
The flight arrives 1 day after departure.

Direct Flights:

United Airlines UA1924

23:59

Denver (DEN)

05:17(+1)

Washington Dulles (IAD)

Effective 2026-03-05 through 2026-03-27

Mon
-

Tue
-

Wed

Thu

Fri

Sat
-

Sun

Duration: 3:18, non-stop
Boeing 737-900 (739)
The flight arrives 1 day after departure.

Direct Flights:

United Airlines UA1924

23:59

Denver (DEN)

06:17(+1)

Washington Dulles (IAD)

Operates only on 2026-03-07

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:18, non-stop
Boeing 737 MAX 9 (7M9)
The flight arrives 1 day after departure.

Direct Flights:

United Airlines UA1924

23:59

Denver (DEN)

05:17(+1)

Washington Dulles (IAD)

Effective 2026-03-09 through 2026-03-24

Mon

Tue

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 3:18, non-stop
Boeing 757-200 (752)
The flight arrives 1 day after departure.

Direct Flights:

United Airlines UA1924

23:59

Denver (DEN)

05:17(+1)

Washington Dulles (IAD)

Effective 2026-03-14 through 2026-03-28

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:18, non-stop
Boeing 737 MAX 9 (7M9)
The flight arrives 1 day after departure.

Direct Flights:

United Airlines UA1924

23:59

Denver (DEN)

05:27(+1)

Washington Dulles (IAD)

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

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 3:28, non-stop
Boeing 737 MAX 9 (7M9)
The flight arrives 1 day after departure.

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:

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:

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.

Non-Direct Flights:

United Airlines UA326

07:45

Denver (DEN)

16:30

Washington Dulles (IAD)

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

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 6:45, 1-stop
Boeing 737-800 (738)

Non-Direct Flights:

United Airlines UA326

07:45

Denver (DEN)

16:30

Washington Dulles (IAD)

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 6:45, 1-stop
Boeing 737 MAX 8 (7M8)

Non-Direct Flights:

United Airlines UA326

07:45

Denver (DEN)

16:30

Washington Dulles (IAD)

Effective 2026-02-15 through 2026-03-01

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 6:45, 1-stop
Boeing 737 MAX 8 (7M8)

Non-Direct Flights:

United Airlines UA1023

15:20

Denver (DEN)

00:15(+1)

Washington Dulles (IAD)

Valid until 2026-01-05

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 6:55, 1-stop
Airbus A321neo (32Q)
The flight arrives 1 day after departure.

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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 3:14 and 3:35.

All DEN-IAD flights

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