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Good to Know: Flights to IAD
Useful information for finding cheap flights to Washington Dulles International and booking your next trip
Cheapest Round Trip Flight
$574
Southwest Airlines• nonstop • 5h 20mMay 20 – May 29
The cheapest round trip flight from Denver International to Washington Dulles International is currently $574
Cheapest One way Flight
$296
United Airlines• nonstop• 2h 19mMay 20
The cheapest one way flight from Toronto Pearson International to Washington Dulles International is currently $296
Cheapest Direct Flight
$574
Southwest Airlines• nonstop• 5h 20mMay 20
The cheapest nonstop flight from Denver International to Washington Dulles International is currently $574
Fastest Flight
2h 19m
The fastest nonstop flight from Toronto Pearson International to Washington Dulles International takes 2h 19m
Best Flight Deals to Washington
Identify the most efficient round-trip flights to Washington. We present options balancing cost and convenience for your return journey.
May 20 - May 29, Economy
Denver → Washington
5h 20m
11:30 AM - 4:50 PM • nonstop
Denver → Washington
6h 45m
5:55 PM - 8:00 PM • nonstop
Southwest Airlines
May 20 - May 29, Economy
Denver → Washington
31h 55m
7:50 PM - 5:05 PM • 1 stop
Denver → Washington
6h 45m
5:55 PM - 8:00 PM • nonstop
Southwest Airlines
May 20 - May 29, Economy
Denver → Washington
31h 55m
7:50 PM - 5:05 PM • 1 stop
Denver → Washington
13h 45m
4:30 PM - 10:55 PM • 1 stop
Southwest Airlines
May 20 - May 29, Economy
Denver → Washington
30h 25m
8:40 PM - 5:05 PM • 1 stop
Denver → Washington
35h 40m
4:30 PM - 12:10 PM • 2 stops
Southwest Airlines
May 20 - May 29, Economy
Denver → Washington
25h 59m
6:00 AM - 11:59 PM • 1 stop
Denver → Washington
24h 11m
9:00 AM - 9:51 PM • 1 stop
Alaska Airlines
For travel requiring no set return, access available one-way flights to Washington (IAD). These options support extended stays or open-ended plans.
Need to travel to Washington soon? View current last-minute flight options to IAD for spontaneous or pressing plans.
May 20 - May 29, Economy
Denver → Washington
5h 20m
11:30 AM - 4:50 PM • nonstop
Denver → Washington
6h 45m
5:55 PM - 8:00 PM • nonstop
Southwest Airlines
May 20 - May 29, Economy
Denver → Washington
31h 55m
7:50 PM - 5:05 PM • 1 stop
Denver → Washington
6h 45m
5:55 PM - 8:00 PM • nonstop
Southwest Airlines
May 20 - May 29, Economy
Denver → Washington
31h 55m
7:50 PM - 5:05 PM • 1 stop
Denver → Washington
13h 45m
4:30 PM - 10:55 PM • 1 stop
Southwest Airlines
May 20 - May 29, Economy
Denver → Washington
30h 25m
8:40 PM - 5:05 PM • 1 stop
Denver → Washington
35h 40m
4:30 PM - 12:10 PM • 2 stops
Southwest Airlines
May 20 - May 29, Economy
Denver → Washington
25h 59m
6:00 AM - 11:59 PM • 1 stop
Denver → Washington
24h 11m
9:00 AM - 9:51 PM • 1 stop
Alaska Airlines
Maximize your time in Washington, not in transit. Discover non-stop direct flights to IAD for the quickest, most straightforward journey to the Strip.
May 20 - May 29, Economy
Denver → Washington
5h 20m
11:30 AM - 4:50 PM • nonstop
Denver → Washington
6h 45m
5:55 PM - 8:00 PM • nonstop
Southwest Airlines
May 20 - May 29, Economy
Denver → Washington
5h 28m
6:00 AM - 11:28 AM • nonstop
Denver → Washington
5h 54m
12:48 PM - 2:42 PM • nonstop
United Airlines
May 20 - May 29, Economy
Denver → Washington
5h 28m
3:52 PM - 9:20 PM • nonstop
Denver → Washington
5h 52m
6:30 AM - 8:22 AM • nonstop
United Airlines
May 20 - May 29, Economy
Denver → Washington
5h 27m
12:05 PM - 5:32 PM • nonstop
Denver → Washington
5h 54m
2:35 PM - 4:29 PM • nonstop
United Airlines
May 20 - May 29, Economy
Denver → Washington
5h 30m
1:30 PM - 7:00 PM • nonstop
Denver → Washington
5h 52m
6:30 AM - 8:22 AM • nonstop
United Airlines
Destination Airport Information
| IATA Code | IAD |
| Name | Washington Dulles International |
| City | Washington |
| Country | US |
| Latitude | 38.94449996948242 |
| Longitude | -77.45580291748047 |
Popular Airlines
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