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$745 Find Cheap Flights from Seattle to Belfast City Airport

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Belfast City departing on 6/7. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult

KAYAK searches hundreds of travel sites at once for deals on flights to Belfast City Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Belfast, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Belfast, as well as popular online travel agencies
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Cheap Flights from Seattle to Belfast City

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Belfast City that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Recent round-trip flight deals from Seattle to Belfast City

KAYAK's recommended round-trip deals from the most popular airlines that fly from Seattle to Belfast City.
Discover the best prices for you by selecting your travel dates on KAYAK.
Choose your dates
Logo
5:30 am - 9:10 pmSEA-BHD
31h 40m3 stops
Logo
7:00 am - 12:10 amBHD-SEA
25h 10m3 stops
$869
Find Deal
Sun, May 18 - Fri, May 23
British Airways Logo
1:30 pm - 11:30 amSEA-BHD
14h 00m1 stop
British Airways Logo
6:30 pm - 11:10 amBHD-SEA
24h 40m1 stop
$881British Airways
Find Deal
Sun, May 4 - Mon, May 12
Delta Logo
1:55 pm - 9:15 pmSEA-BHD
23h 20m1 stop
Delta Logo
5:25 pm - 11:40 amBHD-SEA
26h 15m1 stop
$932Delta
Find Deal
Sun, May 4 - Mon, May 12
Delta Logo
1:55 pm - 9:15 pmSEA-BHD
23h 20m1 stop
Delta Logo
5:25 pm - 8:49 pmBHD-SEA
35h 24m2 stops
$942Delta
Find Deal
Sun, May 4 - Mon, May 12
KLM Logo
6:07 pm - 4:55 pmSEA-BHD
14h 48m1 stop
KLM Logo
6:30 am - 4:08 pmBHD-SEA
17h 38m2 stops
$999KLM
Find Deal
Sat, May 3 - Sat, May 10
Aer Lingus Logo
7:35 pm - 8:25 pmSEA-BHD
16h 50m2 stops
Aer Lingus Logo
6:50 am - 5:50 pmBHD-SEA
19h 00m2 stops
$1,055Aer Lingus
Find Deal
Fri, Jun 6 - Fri, Jun 13
Aer Lingus Logo
7:35 pm - 9:05 amSEA-BHD
29h 30m2 stops
Aer Lingus Logo
7:00 pm - 5:50 pmBHD-SEA
30h 50m2 stops
$1,196Aer Lingus
Find Deal
Sat, Jun 7 - Sat, Jun 14
American Airlines Logo
8:20 pm - 6:15 pmSEA-BHD
13h 55m1 stop
American Airlines Logo
11:55 am - 10:59 pmBHD-SEA
19h 04m2 stops
$1,210American Airlines
Find Deal
Fri, Jun 6 - Fri, Jun 13
American Airlines Logo
8:20 pm - 5:15 pmSEA-BHD
12h 55m1 stop
American Airlines Logo
4:15 pm - 11:30 amBHD-SEA
27h 15m1 stop
$1,254American Airlines
Find Deal
Sat, Jun 7 - Sat, Jun 14
KLM Logo
6:35 pm - 9:15 pmSEA-BHD
18h 40m2 stops
KLM Logo
6:30 am - 4:08 pmBHD-SEA
17h 38m2 stops
$1,558KLM
Find Deal
Sat, May 3 - Sat, May 10

KAYAK's insights & trends for Seattle to Belfast City flights

Get data-powered insights and trends into flights from Seattle to Belfast City to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from Seattle to Belfast City Airport?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the past 3 days, the cheapest round-trip tickets from Seattle to Belfast City Airport were found on British Airways ($881) and Delta ($932).
Find deals

Good to know

Cheapest flight

$745
Flight from Seattle to Belfast City Airport

When to book flights from Seattle to Belfast City

Are your dates flexible? Find out the best times to travel from Seattle to Belfast City based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Seattle to Belfast City Airport flights

  • What is the cheapest flight from Seattle to Belfast City Airport?

    In the last 3 days, the lowest price for a flight from Seattle to Belfast City Airport was $745 for a one-way ticket and $869 for a round-trip.

  • Do I need a passport to fly between Seattle and Belfast City Airport?

    Yes, you’ll need a passport to travel to Belfast City Airport from Seattle.

  • Which aircraft models fly most regularly from Seattle to Belfast City Airport?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Seattle to Belfast City Airport?

    oneworld, and SkyTeam are the airline alliances operating flights between Seattle and Belfast City Airport, with SkyTeam being the most commonly used for this route.

  • How does KAYAK find such low prices on flights from Seattle to Belfast City Airport?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Seattle to Belfast City Airport.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Seattle to Belfast City Airport?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Belfast City Airport from Seattle is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Seattle to Belfast City Airport?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Belfast City Airport with an airline and back to Seattle with another airline. Booking your flights between Seattle and BHD can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Seattle to Belfast City Airport?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Belfast City Airport from Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top airline flying from Seattle to Belfast City

 
See real verified KAYAK customer reviews for airlines flying from Seattle to Belfast. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Seattle to Belfast City? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
6.6
British AirwaysOverall score based on 6799 reviews
6.7Comfort
6.3Food
6.8Boarding
7.6Crew
6.4Entertainment
Airline reviews

Cancelled flight minutes before boarding. Rescheduled flight was two days later

2.0 MediocreAlex, Apr 2025SFO - LHR
Read more British Airways reviews

Cancelled flight minutes before boarding. Rescheduled flight was two days later

The flight attendants were EXTREMELY personable and appreciated the service, lights going off after dinner (probably the norm, but I haven’t flown evening overnight flights in a while). Thank you!

Business class seats were very dated on my plane. Very little storage, charging ports were not easily accessible, tv screen kept flopping away. Vegetarian food was disappointing: hardly any protein and severely under-seasoned. Crew was lovely.

The food was ok, but not great. They delayed boarding in Portland and did not enforce group boarding. But the crew was excellent, went above and beyond.

The food was pathetic. There wasn't much leg room and recline space for such a long flight. No tea/ coffee for a 2-3 hour connecting flight without purchasing! Really!?

Service was very good. Because I use a cane, I was allowed to use Priority Boarding. Biggest problem was extremely limited leg room in Economy class seats. For airplane food, it was alright.

Was late but that airport/storm fault. Flight was full but comfortable. Food quite nice. Unfortunate that I had a rather miserable attendant, others were much friendlier

Experience was good. Could have been better if we didn’t have to board an hour before the flight to ghana and miss relaxing time in the lounge. That process was very stressful

I was charged fees for check in bags at the airport by British Airways. It was supposed to be no charge but Kayak messed up my booking apparently and I had to pay for check in bags. I paid $175.

They took my carry on and checked it in. Staff in general at Heathrow are not friendly or helpful

Everything you need to know for your flight from Seattle to Belfast City

Information on your arrival and departure airports

Belfast City (BHD)
Seattle (SEA)

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