Cheapest€220.80
- Delta Air Lines DA360016:564h 14m21:10Dallas DFWSeattle BFI
Door to door 7h 24mCO2 684.6 kgChanges 0Fixed, no changes
Dallas to Seattle flight
Flights from Dallas to Seattle start at €259.74 and take 7h 5m at their fastest.
The Flights from Dallas to Seattle starts at €259.74 and takes 7h 5m door to door, run by 5 operators over 2,783 km, with around 30 departures a day. Fares bottom out about 45 days before departure.
- 7h 5mDoor to door
- 3h 55mMoving
- €259.74From
- 684.6 kgCO2
The cheapest and the fastest on September 29, 2026
Two journeys we can sell today, with the service number each operator files them under.
Fastest€220.80
- Asiana Airlines AA594111:493h 55m15:44Dallas DFWSeattle BFI
Door to door 7h 5mCO2 684.6 kgChanges 0Fixed, no changes
Airlines
Speed, flexibility and what is on board. Nothing here is a rating, because we have not earned one.
| Operator | From | Fastest |
|---|---|---|
 American Airlines | €223.75 | 7h 4m |
 Alaska Airlines | €222.57 | 7h 5m |
 Delta Air Lines | €220.80 | 7h 4m |
 Asiana Airlines | €220.80 | 7h 4m |
 Southwest Airlines | €223.75 | 7h 4m |
That is the traveling done. What happens after you walk out into Seattle is not something we sell.
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When to book Dallas to Seattle
The same search run across the whole booking window, so the shape of the curve is visible rather than described.
- €263.8790 days
- €176.5560 days
- €175.3745 days
- €183.6330 days
- €256.2021 days
- €276.8514 days
- €332.317 days
- €322.283 days
- €466.241 days
- Cheapest lead time
- Fares bottom out around 45 days ahead, at €175.37.
- How much it moves
- The gap between the cheapest and most expensive lead time is 166 percent. The most expensive point is €466.24, 1 days out.
- What that means
- Today sits inside the cheap window, which closes about 45 days before departure. Waiting from here has usually cost money on this corridor rather than saved it.
Which departure day costs least
Median cheapest fare for each weekday, taken across the next three weeks of real prices.
- €309.30Sun
- €264.46Mon
- €259.74Tue
- €278.03Wed
- €373.02Thu
- €323.46Fri
- €276.85Sat
Where you leave from and where you arrive
The stations, airports and ports each mode on this corridor actually uses.
Dallas
Air
- DFW
- DAL
Seattle
Air
- SEA
- BFI
What the journey actually looks like
Direct or connecting, how far the route really runs, and what happens when a connection is missed.
- How far it really runs
- The route covers 2,783 km against 2,702 km in a straight line, a detour of 3 percent. Track and road geometry account for the difference.
- First and last departure
- The first service of the day leaves Dallas at 06:03 and the last at 19:45, across 30 departures. The return direction keeps its own timetable, so the times back are not these times reversed.
Questions about Dallas to Seattle
The questions people actually ask about this trip, answered from the same prices and times the page above is built on rather than written once and left to go stale.
How long does the Flight from Dallas to Seattle take?
The Flight from Dallas to Seattle takes 7h 5m door to door, of which 3h 55m is spent moving. The route runs 2,783 km. The difference between the two times is reaching the terminal and leaving it at the far end, which every time on this page includes.
How much does the Flight from Dallas to Seattle cost?
The Flight from Dallas to Seattle starts at €259.74 for one passenger, checked on September 29, 2026. A typical fare is €269.77. Both are the total including taxes, supplier fees and our service fee, so the price here is the price at checkout.
Who runs the Flight from Dallas to Seattle?
5 operators run the Flight from Dallas to Seattle: American Airlines, Alaska Airlines, Delta Air Lines, Asiana Airlines, Southwest Airlines. Between them they file around 30 departures a day. The operator table on this page compares them on fare, journey time, cruising speed, fare conditions and what is provided on board.
Which terminal does the Flight from Dallas to Seattle use?
The Flight from Dallas to Seattle leaves from Dallas DFW and arrives at Seattle BFI. Allow about 3h 10m for reaching the departure terminal and leaving the arrival one. That time is already inside every door to door figure quoted on this page.
When should I book the Flight from Dallas to Seattle?
Fares for the Flight from Dallas to Seattle bottom out around 45 days ahead, at €175.37. The gap between the cheapest and most expensive lead time across the window is 166 percent, measured on September 29, 2026. Booking inside the final week has consistently cost more.
How much CO2 does the Flight from Dallas to Seattle produce?
The Flight from Dallas to Seattle produces about 684.6 kg of CO2 per passenger over 2783 km, which works out at roughly 246 grams per passenger kilometer. That figure is for the whole journey and for one traveler, not for the vehicle.
Where these numbers come from
Observed service A carrier record shows this named operator serving this named pair, and we carry that through unchanged.
Schedules, seat counts and fares are generated by our own model until the supplier contracts are signed. Places, coordinates, operators, which operator serves which pair, and every distance are real. We would rather say that on every page than let a modeled number pass for a filed one.
Defined in full at Door to door, Fares, The booking window, Carbon
- On this page
- Every figure above was computed for Dallas to Seattle on September 12, 2026: 2783 km of route against 2702 km in a straight line, 30 services a day, 5 operators, a cheapest fare of €259.74, and 7h 5m door to door on the fastest mode. The return direction is computed separately and its numbers are not these numbers.
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