Seattle (SEA) → Belfast (BFS)
About Seattle to Belfast Flights
Discover the best flights from Seattle to Belfast, covering 7,184 km in approximately 9h 29m. Seattle (SEA) to Belfast (BFS) is one of the major long-haul routes connecting United States and United Kingdom. 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 Seattle to Belfast.
12-Month Price History
Flight prices from Seattle to Belfast vary significantly throughout the year. February typically offers the best deals with average prices around $1351, while July sees the highest prices, averaging $2299. 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
97 days
For best prices
Booking Tips
For the best prices on Seattle to Belfast flights, we recommend booking 139 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 |
|---|---|---|---|
Delta Air Lines DL | $2280 | $8460 | $12830 |
Alaska Airlines AS | $2370 | $7470 | $13240 |
United Airlines UA | $2480 | $8940 | $12110 |
British Airways BA | $2560 | $10060 | $15170 |
Air France AF | $2660 | $10150 | $16170 |
American Airlines AA | $2720 | $9560 | $11790 |
Lufthansa LH | $2820 | $9150 | $17590 |
Delta Air Lines
DL
Economy
$2280
Business
$8460
First
$12830
Alaska Airlines
AS
Economy
$2370
Business
$7470
First
$13240
United Airlines
UA
Economy
$2480
Business
$8940
First
$12110
British Airways
BA
Economy
$2560
Business
$10060
First
$15170
Air France
AF
Economy
$2660
Business
$10150
First
$16170
American Airlines
AA
Economy
$2720
Business
$9560
First
$11790
Lufthansa
LH
Economy
$2820
Business
$9150
First
$17590
Prices shown are estimates based on historical data. Actual prices may vary based on dates, availability, and current promotions.
Alternative Flight Options
Seattle → Dublin
Seattle-Tacoma International (SEA) to Dublin (DUB)
Distance: 7,284 km
Average price: $1550
Seattle → Glasgow
Seattle-Tacoma International (SEA) to Glasgow International (GLA)
Distance: 7,159 km
Average price: $1526
Seattle → Glasgow
Seattle-Tacoma International (SEA) to Glasgow International (GLA)
Distance: 7,159 km
Average price: $1526
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Frequently Asked Questions
How long is the flight from Seattle to Belfast?
The flight time from Seattle (SEA) to Belfast (BFS) 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 Seattle and Belfast?
The aerial distance between Seattle and Belfast is 7,184 kilometers (4,464 miles). This is the straight-line distance, which is used to calculate flight times.
Which airlines fly from Seattle to Belfast?
Several airlines operate flights between Seattle and Belfast, 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 Seattle to Belfast?
Based on historical data, February typically offers the lowest airfares for flights from Seattle to Belfast. 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 Belfast?
For the best prices on Seattle to Belfast flights, we recommend booking 124 days in advance. International flights generally require earlier booking than domestic routes.
Do I need a visa to travel from Seattle to Belfast?
Visa requirements depend on your nationality and the purpose of your visit. Citizens of United States traveling to United Kingdom should check the latest visa requirements. Visit our partner site visarequirements.io for detailed visa information.
What is the time difference between Seattle and Belfast?
Seattle operates on America/Los_Angeles time zone, while Belfast is in the Europe/London time zone. For current time differences and to plan your schedule, visit our partner site timezig.com for accurate timezone conversions.