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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
$485
Delta Airlines• 1 stop • 14h 14mAug 01 – Aug 14
The cheapest round trip flight from Seattle Tacoma International to Washington Dulles International is currently $485
Cheapest One way Flight
$250
Delta Airlines• 1 stop• 10h 17mJun 08
The cheapest one way flight from Toronto Pearson International to Washington Dulles International is currently $250
Cheapest Direct Flight
$355
Delta Airlines• nonstop• 8h 23mAug 01
The cheapest nonstop flight from Seattle Tacoma International to Washington Dulles International is currently $355
Fastest Flight
7h 36m
The fastest nonstop flight from Seattle Tacoma International to Washington Dulles International takes 7h 36m
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.
Aug 01 - Aug 14, Economy
Seattle → Washington
14h 14m
7:25 AM - 7:19 PM • 1 stop
Seattle → Washington
9h 5m
7:10 AM - 9:55 AM • nonstop
Delta Airlines
Jul 31 - Aug 13, Economy
Seattle → Washington
13h 22m
10:58 PM - 10:00 AM • 1 stop
Seattle → Washington
9h 5m
7:10 AM - 9:55 AM • nonstop
Delta Airlines
Aug 01 - Aug 14, Economy
Seattle → Washington
7h 36m
10:43 PM - 6:39 AM • nonstop
Seattle → Washington
9h 5m
6:03 AM - 8:48 AM • nonstop
Alaska Airlines
Aug 01 - Aug 14, Economy
Seattle → Washington
8h 29m
8:15 AM - 4:24 PM • nonstop
Seattle → Washington
18h 42m
6:30 AM - 2:52 PM • 1 stop
United Airlines
Aug 01 - Aug 14, Economy
Seattle → Washington
12h 30m
1:55 PM - 12:45 AM • 1 stop
Seattle → Washington
18h 42m
6:30 AM - 2:52 PM • 1 stop
United 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.
Maximize your time in Washington, not in transit. Discover non-stop direct flights to IAD for the quickest, most straightforward journey to the Strip.
Aug 01 - Aug 14, Economy
Seattle → Washington
8h 23m
4:05 PM - 12:08 AM • nonstop
Seattle → Washington
9h 5m
7:10 AM - 9:55 AM • nonstop
Delta Airlines
Aug 01 - Aug 14, Economy
Seattle → Washington
7h 38m
4:01 PM - 11:59 PM • nonstop
Seattle → Washington
9h 5m
6:03 AM - 8:48 AM • nonstop
Alaska Airlines
Aug 01 - Aug 14, Economy
Seattle → Washington
7h 38m
4:01 PM - 11:59 PM • nonstop
Seattle → Washington
9h 5m
6:03 AM - 8:48 AM • nonstop
American Airlines
Aug 01 - Aug 14, Economy
Seattle → Washington
8h 29m
8:15 AM - 4:24 PM • nonstop
Seattle → Washington
9h 5m
6:03 AM - 8:48 AM • nonstop
United Airlines
Aug 01 - Aug 14, Economy
Seattle → Washington
7h 36m
10:43 PM - 6:39 AM • nonstop
Seattle → Washington
9h 5m
6:03 AM - 8:48 AM • nonstop
Alaska 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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