Need help booking?
Unpublished phone-only deals available
HEL to SEA: distance & flight time
Helsinki (Helsinki Vantaa Airport) → Seattle (Seattle Tacoma International Airport)
4,768 mi
7,673 km · 4,143 nm
9h 49m
estimated nonstop flight time
-10h
time difference · heading northwest
See live HEL→SEA fares Phone-only fares on this route — call free
Flight time details
4,768 miles nonstop takes roughly 9h 49m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 10-hour time set-back when reading arrival times on your ticket.
The two airports
- HEL — Helsinki Vantaa Airport · Helsinki, Finland
- 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 HEL
- HEM · Helsinki Malmi Airport5 mi away
- HYV · Hyvinkää Airfield23 mi away
- QLF · Lahti Vesivehmaa Airport62 mi away
- TLL · Lennart Meri Tallinn Airport63 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 HEL from SEA?
The flight distance from Helsinki (HEL) to Seattle (SEA) is 4,768 miles (7,673 km, 4,143 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from HEL to SEA?
A nonstop flight takes about 9h 49m 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 Helsinki and Seattle?
Seattle is 10 hours behind Helsinki.
What is the cheapest way to fly from HEL to SEA?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on HEL–SEA that never appear on search engines, with no booking fees.