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ASH to SEA: distance & flight time
Nashua (Boire Field) → Seattle (Seattle Tacoma International Airport)
2,453 mi
3,948 km · 2,132 nm
5h 17m
estimated nonstop flight time
-3h
time difference · heading northwest
See live ASH→SEA fares Phone-only fares on this route — call free
Flight time details
2,453 miles nonstop takes roughly 5h 17m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 3-hour time set-back when reading arrival times on your ticket.
The two airports
- ASH — Boire Field · Nashua, United States
- SEA — Seattle Tacoma International Airport · Seattle, United States
Distances are great-circle ("as the crow flies") — the same basis airlines use for frequent-flyer miles.
Alternate airports can cut this fare
Flying from or into a nearby airport is the #1 trick our agents use to beat online prices. Call and we'll compare every combination on one call.
Near ASH
- BOS · General Edward Lawrence Logan International Airport39 mi away
- MHT · Manchester-Boston Regional Airport11 mi away
- LWM · Lawrence Municipal Airport20 mi away
- BED · Laurence G Hanscom Field24 mi away
Near SEA
- RNT · Renton Municipal Airport5 mi away
- BFI · Boeing Field King County International Airport6 mi away
- TIW · Tacoma Narrows Airport18 mi away
- PWT · Bremerton National Airport21 mi away
Frequently asked questions
How far is ASH from SEA?
The flight distance from Nashua (ASH) to Seattle (SEA) is 2,453 miles (3,948 km, 2,132 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ASH to SEA?
A nonstop flight takes about 5h 17m gate to gate. Actual time varies with winds, routing and season — eastbound transatlantic flights, for example, are usually faster than the return.
What is the time difference between Nashua and Seattle?
Seattle is 3 hours behind Nashua.
What is the cheapest way to fly from ASH to SEA?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ASH–SEA that never appear on search engines, with no booking fees.