Your next trip, last seen at €125
Lowest observedWhen 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
- €125, departing 29 Jan 2027 (Last checked: 19 Oct 2026)One-way fareCheck live prices for this route
- Airlines seen
- Alaska Airlines, American Airlines, Breeze Airways, Delta Air Lines, Frontier Airlines, JetBlue, Southwest Airlines, United Airlines (8)
- Reported fastest flight
- 5h 58m
- Non-stop
- Yes
About this route
Explore the fares we observed from Charleston to Seattle. Prices move often, so pick your dates to see the latest options.
- Route distance
- 3,900 km
- Reported fastest flight
- 5h 58m
- Alternative airports
- BFI
Route-level information; individual journeys vary.
Published schedules report non-stop service with Alaska Airlines. Check current timetables.
A clearer picture of your fare
Airport to city: straight-line distance
- Charleston International Airport (CHS) → Charleston, city gazetteer reference point (32.7765, -79.9311): ≈ 17 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 one-way fare we saw per airline
Cheapest airline from Charleston to Seattle: Southwest Airlines, from €125 (checked 19 Oct 2026).
| Airline | Lowest fare | Priced days |
|---|---|---|
| Southwest Airlines | €125Jan 29, 2027 | 4 |
| American Airlines | €145Jan 29, 2027 | 3 |
| Delta Air Lines | €145Jan 29, 2027 | 3 |
| United Airlines | €145Jan 29, 2027 | 3 |
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 Charleston to Seattle?
The lowest fare Routavio has observed is €125, found on 19 Oct 2026. Prices move, so read it as a floor rather than a quote.
When is the cheapest month to fly from Charleston to Seattle?
In our observations January 2027 is the cheapest month so far, at €125.
Are there direct flights from Charleston to Seattle?
Yes. Published schedules report non-stop flights on this route with Alaska Airlines.
Which airlines fly from Charleston to Seattle?
Routavio has seen these carriers on the route: Alaska Airlines, American Airlines, Breeze Airways, Delta Air Lines, Frontier Airlines, JetBlue, Southwest Airlines, United Airlines (8).
How long does the flight from Charleston to Seattle take?
Across the 81 fares Routavio observed, the average journey time is 14h 17m, including any stops. Individual departures vary; the fastest observed flight is listed in the route facts above.
How many of the observed Charleston to Seattle fares were non-stop?
41 of the 81 fares we observed were non-stop; the rest included at least one stop. That describes our observations, not every flight that operates.
Which airline has the lowest fare from Charleston to Seattle?
Cheapest airline from Charleston to Seattle: Southwest Airlines, from €125 (checked 19 Oct 2026).
How observed prices work, what "No data" means and what a fare includes: Read the flight price guide
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Recently observed fares. Prices may change.
Last checked: 26 Oct 2026