Washington to Seattle flights
Routavio compares airline fares from several flight booking sites. The lowest one-way fare it found for Washington to Seattle is €95 with Frontier Airlines (checked on 21 Oct 2026).
Your next trip, last seen at €95
Lowest observedFrontier Airlines · 2 stops · One wayWhen to fly
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The lowest fare we observed for each month. Open a month to see its days, then pick your outbound and return. A day with no price is one we will search for you.
One-way fare
- Lowest observed
- €95, departing 8 Dec 2026 (Last checked: 21 Oct 2026)One-way fare · Priced departure days checked in the last 14 days: 27Check live prices for this route
- Airlines seen
- Alaska Airlines, United Airlines, Frontier Airlines
- Reported fastest flight
- 5h 50m
- Non-stop
- Yes
About this route
Explore the fares we observed from Washington to Seattle. Prices move often, so pick your dates to see the latest options.
- Route distance
- 3,737 km
- Reported fastest flight
- 5h 50m
- Alternative airports
- DCA, BFI
Route-level information; individual journeys vary.
Published schedules report non-stop service with Alaska Airlines, United Airlines. Check current timetables.
A clearer picture of your fare
If the observed fare for this date drops, we will email you. At most one message a day.
Non-stop airlines seen on this route
| Airline | Non-stop days / priced days | Fastest non-stop |
|---|---|---|
| Alaska Airlines | 50 / 81 |
Departure days with a non-stop fare checked in the last 14 days. A carrier listed here had a non-stop fare on at least 3 days; schedules may differ.
Airport to city: straight-line distance
- Ronald Reagan Washington National Airport (DCA) → Washington, city gazetteer reference point (38.8951, -77.0364): ≈ 5 km.
- Washington Dulles International Airport (IAD) → Washington, city gazetteer reference point (38.8951, -77.0364): ≈ 37 km.
- King County International Airport - Boeing Field (BFI) → Seattle, city gazetteer reference point (47.6062, -122.3321): ≈ 9 km.
- Seattle–Tacoma International Airport (SEA) → Seattle, city gazetteer reference point (47.6062, -122.3321): ≈ 18 km.
Approximate distances calculated from coordinates, not road distances or travel times. These airports serve the city; they are not confirmed endpoints of an offer.
Lowest fare by departure month
| Month | Lowest fare | Priced days |
|---|---|---|
| November 2026 | €138 | 22 |
| December 2026 | €152 | 5 |
Lowest fare by day of the week
Cheapest day of the week from Washington to Seattle: Wednesday, from €138 (checked 29 Oct 2026).
| Day | Lowest fare | Priced days |
|---|---|---|
| Monday | €158 | 3 |
| Tuesday | €154 | 4 |
| Wednesday | €138 | 5 |
| Thursday | €154 | 4 |
| Friday | €154 | 4 |
| Saturday | €152 | 4 |
| Sunday | €158 | 3 |
One-way fares checked in the last 14 days. Each figure is the lowest priced departure day we saw, not a guaranteed fare.
Lowest fare by days before departure
Lowest fare from Washington to Seattle by days until departure (8 to 30 days): €138 (checked 29 Oct 2026).
| Days before departure | Lowest fare | Priced days |
|---|---|---|
| 0 to 7 days | €179 | 5 |
| 8 to 30 days | €138 | 18 |
| 31 to 60 days | €152 | 4 |
One-way fares checked in the last 14 days. Each figure is the lowest stored fare for that distance to departure, not a price forecast.
Fares for different departure dates, checked now; not a guide to when to book.
Lowest one-way fare we saw per airline
Cheapest airline from Washington to Seattle: Frontier Airlines, from €95 (checked 21 Oct 2026).
| Airline | Lowest fare | Priced days |
|---|---|---|
| Frontier Airlines | €95Dec 8, 2026 | 24 |
| Alaska Airlines | €136Jan 4, 2027 | 52 |
| United Airlines | €173Jan 9, 2027 | 5 |
One-way fares checked in the last 14 days. An airline listed here had a fare on at least 3 departure days. Each figure is the lowest we saw, not a guaranteed fare. Connecting itineraries are included; the date is the departure day of that fare.
Frequently asked
How much is a flight from Washington to Seattle?
The lowest fare Routavio has observed is €95, found on 21 Oct 2026. Prices move, so read it as a floor rather than a quote.
When is the cheapest month to fly from Washington to Seattle?
In our observations December 2026 is the cheapest month so far, at €95.
Are there direct flights from Washington to Seattle?
Yes. Published schedules report non-stop flights on this route with Alaska Airlines, United Airlines.
Which airlines fly from Washington to Seattle?
Routavio has seen these carriers on the route: Alaska Airlines, United Airlines, Frontier Airlines.
How long does the flight from Washington to Seattle take?
Across the 54 fares Routavio observed, the average journey time is 9h 29m, including any stops. Individual departures vary; the fastest observed flight is listed in the route facts above.
How many of the observed Washington to Seattle fares were non-stop?
61 of the 82 fares we observed were non-stop; the rest included at least one stop. That describes our observations, not every flight that operates.
Which airlines had non-stop offers on at least 3 departure dates from Washington to Seattle?
For Washington to Seattle, examples of observed one-way non-stop offers checked within the last 14 days: Alaska Airlines (50). Each number counts distinct departure dates, not weekly flights; check current availability in search.
Which day of the week is cheapest from Washington to Seattle?
Cheapest day of the week from Washington to Seattle: Wednesday, from €138 (checked 29 Oct 2026).
Which airline has the lowest fare from Washington to Seattle?
Cheapest airline from Washington to Seattle: Frontier Airlines, from €95 (checked 21 Oct 2026).
How observed prices work, what "No data" means and what a fare includes: Read the flight price guide · Price and schedule freshness on Routavio
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Recently observed fares. Prices may change.