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SEA to SEN: distance & flight time
Seattle (Seattle Tacoma International Airport) → Southend (Southend Airport)
4,811 mi
7,742 km · 4,180 nm
9h 54m
estimated nonstop flight time
+8h
time difference · heading northeast
See live SEA→SEN fares Phone-only fares on this route — call free
Flight time details
4,811 miles nonstop takes roughly 9h 54m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 8-hour time gain when reading arrival times on your ticket.
The two airports
- SEA — Seattle Tacoma International Airport · Seattle, United States
- SEN — Southend Airport · Southend, United Kingdom
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 SEN
- LGW · London Gatwick Airport48 mi away
- LHR · London Heathrow Airport50 mi away
- RCS · Rochester Airport17 mi away
- LCY · London City Airport28 mi away
Frequently asked questions
How far is SEA from SEN?
The flight distance from Seattle (SEA) to Southend (SEN) is 4,811 miles (7,742 km, 4,180 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from SEA to SEN?
A nonstop flight takes about 9h 54m 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 Southend?
Southend is 8 hours ahead of Seattle.
What is the cheapest way to fly from SEA to SEN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on SEA–SEN that never appear on search engines, with no booking fees.