Need help booking?
Unpublished phone-only deals available
SEA to ASH: distance & flight time
Seattle (Seattle Tacoma International Airport) → Nashua (Boire Field)
2,453 mi
3,948 km · 2,132 nm
5h 17m
estimated nonstop flight time
+3h
time difference · heading east
See live SEA→ASH fares Phone-only fares on this route — call free
Flight time details
2,453 miles nonstop takes roughly 5h 17m gate to gate, flying east. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 3-hour time gain when reading arrival times on your ticket.
The two airports
- SEA — Seattle Tacoma International Airport · Seattle, United States
- ASH — Boire Field · Nashua, 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 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
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
Frequently asked questions
How far is SEA from ASH?
The flight distance from Seattle (SEA) to Nashua (ASH) 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 SEA to ASH?
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 Seattle and Nashua?
Nashua is 3 hours ahead of Seattle.
What is the cheapest way to fly from SEA to ASH?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on SEA–ASH that never appear on search engines, with no booking fees.