Cheapest€323.46
- Alaska Airlines AA332909:396h 28m16:07Boston BOSSeattle BFI
Door to door 9h 38mCO2 609.8 kgChanges 0Fixed, no changes
Traveling from Boston to Seattle costs €323.46 at the cheapest and takes 8h 44m door to door at the fastest, across 1 mode and 3 operators. The route covers 4,120 km. Cheapest is by Flight, fastest is by Flight.
At a glance
- Distance
- 4,120 km
- Fastest
- 8h 44m
- Average
- 9h 10m
- Services per day
- 19
- Cheapest
- €323.46
- CO2 per passenger
- 609.8 kg
Every way to make this journey
Journey times below are door to door, so they include getting to the terminal and away from it at the other end. Fares are the cheapest we currently sell on September 29, 2026.
| Mode | Door to door | Moving | At the ends | From | CO2 | Per day |
|---|---|---|---|---|---|---|
| Flight | 8h 44m | 5h 34m | 3h 10m | €380.10 | 609.8 kg | 19 |
- 8h 44mFastest, by Flight
- €380.10Cheapest, by Flight
- 609.8 kgLowest CO2, by Flight
- 4,120 kmDistance traveled
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€334.67
- JetBlue Airways JB392506:475h 34m12:21Boston BOSSeattle BFI
Door to door 8h 44mCO2 609.8 kgChanges 0Fixed, no changes
Today's real departures
Live from the operators' own published timetables, through the open transit feeds they publish. Times and services are real. Fares are modeled until our booking connectors are live.
| Operator | Service | Departs | Arrives | Takes |
|---|---|---|---|---|
| Amtrak1 changes | 449 | 16:50 | 18:29 | 73h 53m |
| Amtrak2 changes | 449 | 16:50 | 18:36 | 73h 46m |
| Amtrak2 changes | 449 | 16:50 | 17:32 | 73h 27m |
| Amtrak2 changes | 175 | 19:15 | 18:29 | 71h 28m |
| Amtrak3 changes | 175 | 19:15 | 18:36 | 71h 21m |
| Amtrak3 changes | 175 | 19:15 | 17:32 | 71h 2m |
Prices over the next three weeks
Live from our own engine, refreshed on every request. The cheapest days for each way of traveling are marked.
| Cheapest fare by mode and day for Boston to Seattle | FriSep 11 | SatSep 12 | SunSep 13 | MonSep 14 | TueSep 15 | WedSep 16 | ThuSep 17 | FriSep 18 | SatSep 19 | SunSep 20 | MonSep 21 | TueSep 22 | WedSep 23 | ThuSep 24 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Flight | €857.41 | €810.80 | €695.16 | €547.66 | €472.14 | €533.50 | €650.91 | €477.45 | €495.15 | €463.29 | €403.11 | €380.10 | €407.83 | €516.98 |
Cheapest day: 2026-09-29 · €323.46
Arriving in September changes what you want from a room in Seattle. It is not a thing we sell, so here is who does.
Looking for somewhere to stay in Seattle?
The search opens on Seattle with your nights already filled in, so it is one step to a real price.
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When to book Boston to Seattle
The same search run across the whole booking window, so the shape of the curve is visible rather than described.
- €328.1890 days
- €254.4360 days
- €308.7145 days
- €330.5430 days
- €401.9321 days
- €516.9814 days
- €650.917 days
- €695.163 days
- €857.411 days
- Cheapest lead time
- Fares bottom out around 60 days ahead, at €254.43.
- How much it moves
- The gap between the cheapest and most expensive lead time is 237 percent. The most expensive point is €857.41, 1 days out.
- What that means
- Today sits inside the cheap window, which closes about 60 days before departure. Waiting from here has usually cost money on this corridor rather than saved it.
Book now Fares on this route are lowest around 60 days ahead. You are inside that window.
Which departure day costs least
Median cheapest fare for each weekday, taken across the next three weeks of real prices.
- €463.29Sun
- €403.11Mon
- €380.10Tue
- €407.83Wed
- €516.98Thu
- €477.45Fri
- €495.15Sat
How the fare moves month by month
The same journey priced on the fifteenth of each of the next six months.
- €472.14Sep
- €351.19Oct
- €301.04Nov
- €304.58Dec
- €298.68Jan
- €254.43Feb
The route
What the journey actually looks like
Direct or connecting, how far the route really runs, and what happens when a connection is missed.
- Direct or connecting
- 79% of the services we sell on this corridor run through without a change. The remaining 21% involve one connection.
- How far it really runs
- The route covers 4,120 km against 4,000 km in a straight line, a detour of 3 percent. Track and road geometry account for the difference.
- Where the change is
- Connections are made at Calgary, Toronto, Bozeman, Minneapolis. The gap between arriving and leaving is 66 minutes, of which about 5 is walking.
- If the connection is missed
- The tightest connection we sell here has a 14 percent chance of not being made on the timetable alone. Part of this journey is a self transfer between separate tickets, so leave more time than the minimum and expect to check in again.
- First and last departure
- The first service of the day leaves Boston at 06:14 and the last at 19:38, across 19 departures. The return direction keeps its own timetable, so the times back are not these times reversed.
Where you leave from and where you arrive
The stations, airports and ports each mode on this corridor actually uses.
Boston
Rail
- Boston South Station
- Boston Landing station
- Eastern Railroad Depot (Boston)
Bus
- Boston South Station
- Alewife
Air
- BOS
- BED
Ferry
- Encore Boston Harbor Ferry Landing
- East Boston 6 New Street Ferry Landing
Seattle
Rail
- Seattle King Street
- Westlake
- Union Station
Bus
- Seattle King Street
- Seattle Greyhound Station
Air
- SEA
- BFI
Ferry
- Seattle
- Seattle Waterfront
Who runs this route
Speed, flexibility and what is on board. Nothing here is a rating, because we have not earned one.
| Operator | From | Fastest |
|---|---|---|
 Alaska Airlines | €323.46 | 8h 44m |
 Delta Air Lines | €324.64 | 8h 45m |
 JetBlue Airways | €329.36 | 8h 44m |
What the fare is made of
Every part of the total, so the number at checkout is the number here.
| Part | Amount | Share |
|---|---|---|
| Operator fare | €266.50 | 82% |
| Taxes | €47.97 | 15% |
| Supplier fees | €7.00 | 2% |
| Our service fee | €1.99 | 1% |
| Total you pay | €323.46 | 100% |
A day in Seattle hauling a suitcase is a shorter day than it needs to be. We do not store bags.
Where to leave your bags in Seattle
Most of the points near Seattle King Street open before the first train and close after the last one.
Check Seattle on StasherOr try Bounce
Partner links. We do not run these networks. We earn a commission on a booking, and the price is the same as going direct.
Questions about Boston 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 it take to get from Boston to Seattle?
The fastest journey from Boston to Seattle takes 8h 44m door to door, of which 5h 34m is spent moving, on the Flight. Most services take around 9h 10m, because that average includes slower stopping services and journeys with a connection. Times include reaching the terminal and leaving it at the far end.
How much does it cost to travel from Boston to Seattle?
The cheapest fare from Boston to Seattle is €323.46, checked on September 29, 2026. A typical fare across the next three weeks is €552.97. Both figures are the total for one passenger, including taxes, supplier fees and our service fee, so nothing is added at checkout.
What is the cheapest way to get from Boston to Seattle?
The cheapest way from Boston to Seattle is by Flight, at €380.10 for one passenger on September 29, 2026. That journey takes 8h 44m door to door. Cheaper is rarely faster on this corridor, and the comparison table on this page shows what each mode costs against what it saves.
When should I book Boston to Seattle?
Fares from Boston to Seattle bottom out around 60 days before departure, at €254.43. Across the whole booking window the gap between the cheapest and the most expensive lead time is 237 percent, measured on September 29, 2026. Booking inside the last week has consistently cost more on this corridor.
Which day of the week is cheapest for Boston to Seattle?
Tuesday is the cheapest day to depart from Boston to Seattle, at €380.10. That is the median of 21 priced departure days across the next three weeks, checked on September 29, 2026. Shifting a departure by one day is usually worth more than shifting the booking by one week.
Which month is cheapest for Boston to Seattle?
February is the cheapest of the next 6 months to travel from Boston to Seattle, at €254.43 for one passenger. Each month is priced on its fifteenth, so the comparison is like for like rather than a mix of weekends and midweek departures.
Who runs service from Boston to Seattle?
3 operators sell services from Boston to Seattle across 1 modes: Alaska Airlines, Delta Air Lines, JetBlue Airways. Journey times, fares and fare conditions differ between them, and the operator table on this page compares all of them on speed, flexibility and what is provided on board.
Is there a direct service from Boston to Seattle?
79 percent of the services we sell from Boston to Seattle are direct. The rest connect at Calgary, Toronto, Bozeman, Minneapolis, with about 66 minutes between the two services. Both legs are sold on one booking, so a missed connection is rebooked at no charge.
Which station or terminal do services from Boston to Seattle use?
Services from Boston to Seattle by Flight leave from Boston BOS and arrive at Seattle BFI. Allow about 3h 10m in total for reaching the departure terminal and leaving the arrival one, which is already included in every door to door time on this page.
Can I change or refund a ticket from Boston to Seattle?
0 of the 3 operators we sell from Boston to Seattle allow a change or a refund. A change on a changeable fare costs €5.00. The operator table on this page names which is which, and the condition is shown again before you pay.
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, Distances
- On this page
- Every figure above was computed for Boston to Seattle on September 10, 2026: 4120 km of route against 4000 km in a straight line, 19 services a day, 3 operators, a cheapest fare of €323.46, and 8h 44m door to door on the fastest mode. The return direction is computed separately and its numbers are not these numbers.
The trip is the easy half to plan. The days in Seattle are the half people leave until last.
Anything to book in Seattle before you go?
Day trips that leave Seattle in the morning and cover a good part of United States by evening.
See Seattle on GetYourGuideOr browse Viator
Partner links. We do not sell tours or tickets. We earn a commission on a booking, and it never changes the price.
Other ways to make this journey
Arriving in Seattle
Leaving Seattle
- 136Places you can leave for
- 19Countries
- 50Operators
Plan a trip from here
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