Belfast (BFS) → Seattle (SEA)
About Belfast to Seattle Flights
Discover the best flights from Belfast to Seattle, covering 7,184 km in approximately 9h 29m. Belfast (BFS) to Seattle (SEA) is one of the major long-haul routes connecting United Kingdom and United States. With 7 major airlines operating this route, travelers have plenty of options to choose from. Whether you're traveling for business or leisure, our comprehensive guide helps you find the best deals, understand seasonal price variations, and choose the right airline for your journey from Belfast to Seattle.
12-Month Price History
Flight prices from Belfast to Seattle vary significantly throughout the year. February typically offers the best deals with average prices around $1360, while July sees the highest prices, averaging $2296. Savvy travelers can save up to 41% by choosing their travel dates wisely.
Best Time to Fly
Cheapest Month
February
Save up to 40% on average
Most Expensive
July
Peak season pricing
Book in Advance
63 days
For best prices
Booking Tips
For the best prices on Belfast to Seattle flights, we recommend booking 74 days in advance. International flights typically see price increases as the departure date approaches, so early booking is advisable. Tuesday and Wednesday departures often offer the lowest fares, while Friday and Sunday flights tend to be more expensive due to business and leisure travel demand. Consider flying early morning or late evening for additional savings, as these off-peak times usually have lower demand.
Airlines Serving This Route
| Airline | Economy | Business | First |
|---|---|---|---|
Alaska Airlines AS | $2260 | $9930 | $14860 |
Delta Air Lines DL | $2320 | $8800 | $15770 |
Air France AF | $2430 | $9970 | $15610 |
United Airlines UA | $2540 | $8360 | $15080 |
American Airlines AA | $2760 | $7980 | $12880 |
British Airways BA | $2820 | $9440 | $16240 |
Lufthansa LH | $2890 | $8710 | $16460 |
Alaska Airlines
AS
Economy
$2260
Business
$9930
First
$14860
Delta Air Lines
DL
Economy
$2320
Business
$8800
First
$15770
Air France
AF
Economy
$2430
Business
$9970
First
$15610
United Airlines
UA
Economy
$2540
Business
$8360
First
$15080
American Airlines
AA
Economy
$2760
Business
$7980
First
$12880
British Airways
BA
Economy
$2820
Business
$9440
First
$16240
Lufthansa
LH
Economy
$2890
Business
$8710
First
$16460
Prices shown are estimates based on historical data. Actual prices may vary based on dates, availability, and current promotions.
Alternative Flight Options
Dublin → Seattle
Dublin (DUB) to Seattle-Tacoma International (SEA)
Distance: 7,284 km
Average price: $1550
Glasgow → Seattle
Glasgow International (GLA) to Seattle-Tacoma International (SEA)
Distance: 7,159 km
Average price: $1526
Glasgow → Seattle
Glasgow International (GLA) to Seattle-Tacoma International (SEA)
Distance: 7,159 km
Average price: $1526
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Frequently Asked Questions
How long is the flight from Belfast to Seattle?
The flight time from Belfast (BFS) to Seattle (SEA) is approximately 9 hours and 29 minutes. This duration is for direct flights and may vary depending on aircraft type, weather conditions, and air traffic.
What is the distance between Belfast and Seattle?
The aerial distance between Belfast and Seattle is 7,184 kilometers (4,464 miles). This is the straight-line distance, which is used to calculate flight times.
Which airlines fly from Belfast to Seattle?
Several airlines operate flights between Belfast and Seattle, including Delta Air Lines, Alaska Airlines, American Airlines and 4 more airlines. Most flights on this route include one or more stops.
What is the cheapest month to fly from Belfast to Seattle?
Based on historical data, February typically offers the lowest airfares for flights from Belfast to Seattle. However, prices can vary based on holidays, events, and airline promotions. We recommend checking our price calendar for the most up-to-date information.
How far in advance should I book my flight to Seattle?
For the best prices on Belfast to Seattle flights, we recommend booking 114 days in advance. International flights generally require earlier booking than domestic routes.
Do I need a visa to travel from Belfast to Seattle?
Visa requirements depend on your nationality and the purpose of your visit. Citizens of United Kingdom traveling to United States should check the latest visa requirements. Visit our partner site visarequirements.io for detailed visa information.
What is the time difference between Belfast and Seattle?
Belfast operates on Europe/London time zone, while Seattle is in the America/Los_Angeles time zone. For current time differences and to plan your schedule, visit our partner site timezig.com for accurate timezone conversions.