
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $247 (Super.com) |
One-way from | $138 (Southwest) |
Popular in | March |
Cheapest in | February |
Average price | $418 |
Good round-trip deal | $431 or less |
Good one-way deal | $257 or less |
Fly from
Fly to
Route
Depart
Return
Washington, D.C.Seattle
DCA - SEA
DCASEA
Washington, D.C. Reagan-National
Tue 7/14
4:35 pm-7:41 pm
Nonstop6h 06m
Seattle/Tacoma Intl
Thu 7/23
7:20 am-3:21 pm
Nonstop5h 01m
Washington, D.C.Seattle
DCA - SEA
DCASEA
Washington, D.C. Reagan-National
Mon 8/31
5:00 pm-7:51 pm
Nonstop5h 51m
Seattle/Tacoma Intl
Thu 9/10
1:43 pm-9:59 pm
Nonstop5h 16m
Washington, D.C.Seattle
DCA - SEA
DCASEA
Washington, D.C. Reagan-National
Mon 6/1
6:59 pm-8:17 am
1 stop16h 18m
Seattle/Tacoma Intl
Wed 6/3
1:45 pm-9:59 pm
Nonstop5h 14m
Washington, D.C.Seattle
DCA - SEA
DCASEA
Washington, D.C. Reagan-National
Tue 9/22
5:00 pm-7:51 pm
Nonstop5h 51m
Seattle/Tacoma Intl
Sat 9/26
8:00 am-4:27 pm
Nonstop5h 27m
Washington, D.C.Seattle
DCA - SEA
DCASEA
Washington, D.C. Reagan-National
Fri 7/3
6:59 pm-11:59 pm
1 stop8h 00m
Seattle/Tacoma Intl
Thu 7/9
10:40 pm-10:09 am
1 stop8h 29m
Washington, D.C.Seattle
DCA - SEA
DCASEA
Washington, D.C. Reagan-National
Thu 5/28
7:45 pm-12:05 am
1 stop7h 20m
Seattle/Tacoma Intl
Thu 6/4
5:30 am-9:55 pm
2 stops13h 25m
Washington, D.C.Seattle
DCA - SEA
DCASEA
Washington, D.C. Reagan-National
Fri 6/5
6:15 pm-11:57 pm
1 stop8h 42m
Seattle/Tacoma Intl
Thu 6/11
7:20 am-3:26 pm
Nonstop5h 06m
Washington, D.C.Seattle
DCA - SEA
DCASEA
Washington, D.C. Reagan-National
Thu 5/28
8:00 am-10:59 am
Nonstop5h 59m
Seattle/Tacoma Intl
Wed 6/3
8:00 am-4:19 pm
Nonstop5h 19m
Washington, D.C.Seattle
DCA - SEA
DCASEA
Washington, D.C. Reagan-National
Mon 7/13
4:35 pm-7:41 pm
Nonstop6h 06m
Seattle/Tacoma Intl
Thu 7/23
7:20 am-3:21 pm
Nonstop5h 01m
Washington, D.C.Seattle
DCA - SEA
DCASEA
Washington, D.C. Reagan-National
Tue 8/4
4:50 pm-11:05 pm
2 stops9h 15m
Seattle/Tacoma Intl
Sun 8/9
9:25 pm-2:50 pm
2 stops14h 25m
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy1 star | Trust Score*3 stars |
The best time to book flights from Washington, D.C. Reagan-National Airport to Seattle is 51 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
Currently, February is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to Seattle (average of $293). Flying from Washington, D.C. Reagan-National Airport to Seattle in March is currently the most expensive (average of $546). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Washington, D.C. Reagan-National Airport to Seattle as you normally would.
Denver (DEN) – chosen by Cheapflights users on 75% of 1-stop itineraries from Washington, D.C. Reagan-National Airport to Seattle on Cheapflights.
Chicago (ORD) is the most affordable 1-stop option, with an average round-trip price of $326.
Flights via Chicago (ORD) have the shortest average one-way travel time for 1-stop routes: 8h 10m.
Flights via Chicago (ORD) offer the fastest connection on this route, with an average layover time of 1h 13m.
Comfort
Overall
Food
Boarding
Crew
Entertainment
Reviews
Eugene,Mar 2026
MFR - SEA
Comfort
Overall
Food
Boarding
Crew
Entertainment
Reviews
Eugene,Mar 2026
MFR - SEA
Comfort
Overall
Food
Boarding
Crew
Entertainment
Reviews
Eugene,Mar 2026
MFR - SEA
Comfort
Overall
Food
Boarding
Crew
Entertainment
Reviews
Eugene,Mar 2026
MFR - SEA
Comfort
Overall
Food
Boarding
Crew
Entertainment
Reviews
Eugene,Mar 2026
MFR - SEA
Comfort
Overall
Food
Boarding
Crew
Entertainment
Reviews
Eugene,Mar 2026
MFR - SEA
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$119 | Average$289 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$168 | Average$421 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$178 | Average$361 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$208 | Average$396 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$216 | Average$524 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$218 | Average$392 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$263 | Average$521 | FlexibilityNo cancel fee | On-time75% |