Trip.com
US$354Collected
Compare pricesFlights from Seattle to London
SEA → LON · compared across 9 travel sites
- Flight time
- from 10h 27m nonstop
- Distance
- 7,702 km
- Typical one-way
- US$96
Compare Seattle → London prices on 9 travel sites
Add your dates and open the same search on each travel site to find the cheapest fare. You book directly with the provider.
Booking.com
US$248Collected
Compare pricesAgoda
Flight + hotel bundles that can beat booking separately.
Compare pricesKayak
One of the largest flight metasearch engines worldwide.
Compare pricesKiwi.com
Virtual interlining specialist that mixes airlines creatively.
Compare pricesExpedia
Global OTA giant with package deals and member prices.
Compare pricesSkyscanner
The benchmark flight metasearch — “search everywhere”.
Compare pricesPriceline
Long-standing US OTA with express deals for flights.
Compare pricesMomondo
US$96Collected
Compare pricesFares auto-collected from partner search results on 2026-09-03 (one-way, economy).
Typical prices & when to book
Lowest fare collected
US$96
Momondo
Auto-collected from Momondo search results on 2026-09-03 (one-way, economy). Fares change constantly — click “Compare prices” for live fares.
Seattle → London route guide
The Seattle (SEA) to London (LON) route covers roughly 7,702 km, with an estimated flight time of about 10h 27m for a nonstop service. Compare the travel sites above to find the best fare for your dates — availability and prices differ between them.
Departures use Seattle–Tacoma; arrivals use Heathrow. Both airports handle the route with regular schedules, so same-day connections and day trips are realistic options.
Seattle → London flight FAQ
How long is the flight from Seattle to London?
Nonstop flights from Seattle to London take about 10h 27m. The route covers approximately 7,702 km.
How do I find the cheapest flights from Seattle to London?
Compare the same dates across the 9 travel sites listed above — their fares differ by provider. Midweek departures, flexible dates and booking a few weeks ahead usually help.
Are there direct flights from Seattle to London?
Direct availability changes by season and carrier. The estimated nonstop flight time is about 10h 27m; one-stop options are widely available.