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NHT to SEA: distance & flight time
Northolt (RAF Northolt) → Seattle (Seattle Tacoma International Airport)
4,783 mi
7,697 km · 4,156 nm
9h 51m
estimated nonstop flight time
-8h
time difference · heading northwest
See live NHT→SEA fares Phone-only fares on this route — call free
Flight time details
4,783 miles nonstop takes roughly 9h 51m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 8-hour time set-back when reading arrival times on your ticket.
The two airports
- NHT — RAF Northolt · Northolt, United Kingdom
- 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 NHT
- LHR · London Heathrow Airport6 mi away
- LGW · London Gatwick Airport30 mi away
- HYC · Wycombe Air Park17 mi away
- LCY · London City Airport21 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 NHT from SEA?
The flight distance from Northolt (NHT) to Seattle (SEA) is 4,783 miles (7,697 km, 4,156 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from NHT to SEA?
A nonstop flight takes about 9h 51m 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 Northolt and Seattle?
Seattle is 8 hours behind Northolt.
What is the cheapest way to fly from NHT to SEA?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on NHT–SEA that never appear on search engines, with no booking fees.