Your next trip, last seen at €173
Lowest observedAllegiant Air · 3 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
- €173, departing 16 Nov 2026 (Last checked: 22 Oct 2026)One-way fare · Priced departure days checked in the last 14 days: 75Check live prices for this route
- Airlines seen
- Allegiant Air, American Airlines, Breeze Airways, Delta Air Lines, Frontier Airlines, JetBlue, Sun Country Airlines, United Airlines (8)
- Typical journey time
- 25h 40m
About this route
Explore the fares we observed from Allentown to Seattle. Prices move often, so pick your dates to see the latest options.
- Route distance
- 3,762 km
- Typical journey time
- 25h 40m
- Seen on fares with a connection
- Allegiant Air, United Airlines, Frontier Airlines, American Airlines, Delta Air Lines, Breeze Airways, Sun Country Airlines (7)
- Alternative airports
- BFI
Route-level information; individual journeys vary.
We have not observed non-stop service on this route; the fares shown include at least one stop.
A clearer picture of your fare
Airport to city: straight-line distance
- Lehigh Valley International Airport (ABE) → Allentown, city gazetteer reference point (40.6023, -75.4714): ≈ 6 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
Cheapest month from Allentown to Seattle: November 2026, from €173 (checked 22 Oct 2026).
| Month | Lowest fare | Priced days |
|---|---|---|
| October 2026 | €306 | 3 |
| November 2026 | €173 | 28 |
| December 2026 | €175 | 26 |
| January 2027 | €182 | 18 |
Lowest fare by day of the week
Cheapest day of the week from Allentown to Seattle: Monday, from €173 (checked 22 Oct 2026).
| Day | Lowest fare | Priced days |
|---|---|---|
| Monday | €173 | 12 |
| Tuesday | €210 | 7 |
| Wednesday | €225 | 8 |
| Thursday | €181 | 13 |
| Friday | €211 | 13 |
| Saturday | €243 | 10 |
| Sunday | €212 | 12 |
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 Allentown to Seattle by days until departure (8 to 30 days): €173 (checked 22 Oct 2026).
| Days before departure | Lowest fare | Priced days |
|---|---|---|
| 0 to 7 days | €306 | 7 |
| 8 to 30 days | €173 | 22 |
| 31 to 60 days | €175 | 25 |
| 61 days or more | €182 | 21 |
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 Allentown to Seattle: Allegiant Air, from €173 (checked 22 Oct 2026).
| Airline | Lowest fare | Priced days |
|---|---|---|
| Allegiant Air | €173Nov 16, 2026 | 57 |
| Frontier Airlines | €182Jan 11, 2027 | 5 |
| United Airlines | €241Jan 20, 2027 | 11 |
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 Allentown to Seattle?
The lowest fare Routavio has observed is €173, found on 22 Oct 2026. Prices move, so read it as a floor rather than a quote.
When is the cheapest month to fly from Allentown to Seattle?
Cheapest month from Allentown to Seattle: November 2026, from €173 (checked 22 Oct 2026).
Are there direct flights from Allentown to Seattle?
Our data holds no non-stop flight from Allentown to Seattle. The fares on this page include at least one stop.
Which airlines fly from Allentown to Seattle?
Routavio has seen these carriers on the route: Allegiant Air, American Airlines, Breeze Airways, Delta Air Lines, Frontier Airlines, JetBlue, Sun Country Airlines, United Airlines (8).
How long does the flight from Allentown to Seattle take?
Across the 85 fares Routavio observed, the average journey time is 36h 16m, including any stops. Individual departures vary; the fastest observed flight is listed in the route facts above.
How many of the observed Allentown to Seattle fares were non-stop?
None of the 85 fares we observed was non-stop; every one included at least one stop. That describes our observations, not every flight that operates.
Which day of the week is cheapest from Allentown to Seattle?
Cheapest day of the week from Allentown to Seattle: Monday, from €173 (checked 22 Oct 2026).
Which airline has the lowest fare from Allentown to Seattle?
Cheapest airline from Allentown to Seattle: Allegiant Air, from €173 (checked 22 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: 29 Oct 2026