Cheap flights from Seattle to Belfast from £236

Trusted by millions

Kiwi.com Guarantee for stress-free travel

One search, all the best deals

Explore flight deals to Belfast

2 stops
Sun, Aug 3
Seattle SEABelfast BFS

£236
Search
2 stops
Sun, Aug 3
Seattle SEABelfast BFS

£288
Search
2 stops
Sun, Aug 3
Seattle SEABelfast BHD

£293
Search
2 stops
Mon, Aug 4
Seattle SEABelfast BFS

£302
Search
2 stops
Tue, Aug 5
Seattle SEABelfast BFS

£304
Search
2 stops
Tue, Aug 5
Seattle SEABelfast BHD

£328
Search

Prices updated:

2 stops
Fri, Aug 8 – Wed, Aug 13
Seattle SEABelfast BHD

£742
Search
2 stops
Fri, Aug 8 – Wed, Aug 13
Seattle SEABelfast BHD

£744
Search
2 stops
Sat, Aug 9 – Thu, Aug 14
Seattle SEABelfast BHD

£749
Search
1 stop
Fri, Aug 8 – Wed, Aug 13
Seattle SEABelfast BHD

£768
Search
1 stop
Wed, Aug 6 – Mon, Aug 11
Seattle SEABelfast BHD

£853
Search
1 stop
Wed, Aug 6 – Mon, Aug 11
Seattle SEABelfast BHD

£858
Search

Prices updated:

How much do flights to Belfast cost?

Key info about flying to Belfast

Depart from
Seattle–Tacoma International
Arrive to
Belfast International
Average flights per week
400
Flight distance
Worth visiting
Giant's Causeway - Trinity College, Dublin - Bru Na Boinne Neolithic Site (County Meath, Ireland)

Check-in for a flight from Seattle to Belfast

NameCarrier codeIATA CodePassport needed during booking
easyJetEZYU2Yes
RyanairRYRFRNo
IcelandairICEFINo
Aer LingusEINEINo
KLM Royal Dutch AirlinesKLMKLNo

Weather in Belfast

Average Weather

MonthAverage monthly max temperatureAverage monthly min temperature
January6°C2°C
February7°C3°C
March9°C3°C
April11°C4°C
May13°C7°C
June16°C9°C
July17°C11°C
August17°C11°C
September15°C10°C
October12°C8°C
November9°C5°C
December7°C3°C
Hottest Month
17°C
July
Coldest month
2°C
January
Sunny days
256
days per year
Snow days
2
days per year

14 day forecast

Sunday
13 Jul
86%
22°C13°C
20 Jul
71%
19°C13°C
Monday
14 Jul
87%
18°C9°C
21 Jul
85%
19°C13°C
Tuesday
15 Jul
84%
16°C9°C
22 Jul
89%
17°C11°C
Wednesday
16 Jul
20°C9°C
23 Jul
82%
16°C11°C
Thursday
17 Jul
17°C12°C
24 Jul
74%
18°C8°C
Friday
18 Jul
17°C13°C
25 Jul
87%
14°C11°C
Saturday
19 Jul
73%
20°C13°C
26 Jul
87%
17°C11°C
Travelers usually depart from Seattle–Tacoma International, Boeing Field, or Kenmore Air Harbor Seaplane Base when they travel from Seattle to Belfast. Book your trip to arrive at Belfast International, or George Best Belfast City. The most popular airlines for this route are easyJet, Ryanair, Icelandair, Aer Lingus, and KLM Royal Dutch Airlines. Seattle and Belfast have 400 direct flights per week. When you arrive at Belfast, consider visiting Giant's Causeway, Trinity College, Dublin, and Bru Na Boinne Neolithic Site (County Meath, Ireland).

Frequently asked questions

What are the most popular routes to and from Seattle?
What are the most popular routes to and from Belfast?
Which airports are there in Seattle?
What airports are near Seattle?
What airports are near Belfast?
Which airlines fly between Seattle and Belfast?
When’s the best time to travel between Seattle and Belfast?
What flights operate between Seattle and Belfast?
How many airports are there near Seattle?
How many airports are there near Belfast?
What time do nonstop (direct) flights between Seattle and Belfast depart?
What time do nonstop (direct) flights between Seattle and Belfast arrive?
What time do flights between Seattle and Belfast depart?
What time do flights between Seattle and Belfast arrive?

Explore alternative trips

Flights from Seattle

Flights to Belfast

Popular routes

The nearest countries with flights to Belfast

Here is a list of countries people are flying from

Other destination countries from Seattle

Here is a list of countries people are flying to

Download our app

Start your next adventure now. Download our app and explore cheap flights effortlessly!

Find the best connection from Seattle to Belfast
Search flights

We hack the system,
you fly for less