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$429 Find cheap flights from Belgium to Seattle

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Seattle departing on 6/12. 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
0 bags
Thu 6/13
Thu 6/20

Search hundreds of travel sites at once for deals on flights to Seattle

 
These are the airlines KAYAK users have selected most often from within our search results for flights to Seattle
These are the airlines KAYAK users have selected most often from within our search results for flights to Seattle
In the last 7 days travelers have searched 42,566,405 times on KAYAK, and here is why:

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Flights to Seattle - Travel Insights & Trends

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

What is the cheapest day to fly to Seattle?

The average price of all flights to Seattle clicked on KAYAK for each day over the last 12 months.
Based on KAYAK data, the cheapest day to fly to Seattle is Friday where tickets can be as cheap as $729. On the other hand, the most expensive day to fly is Sunday, where prices are $919 on average.

What is the cheapest month to fly to Seattle?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights to Seattle, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights to Seattle is September, where tickets cost $644 on average for one-way flights. On the other hand, the most expensive months are July and August, where the average cost of tickets from Belgium is $944 and $799 respectively. For return trips, the best month to travel is September with an average price of $644.

What is the cheapest time of day to fly to Seattle?

The average price for all flights to Seattle depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.
The cheapest time of day to fly to Seattle is generally in the morning, when flights cost $785 on average. The most expensive time of day to fly to Seattle is generally in the afternoon, which is peak travel time and where the average cost of a ticket is $844.

How far in advance should I book a flight to Seattle?

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights to Seattle, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price, you should book around 0 weeks before departure. For the absolute cheapest price, our data suggests you should book 15 days before departure.

How long is the flight to Seattle?

The duration of your flight to Seattle depends on your departure and arrival airports. Obviously any flights that include a layover will also be longer. The most popular route to Seattle on KAYAK is from Brussels, which takes 23h 12m.

How many direct flights to Seattle are there each day?

There are around 896 direct flights from within Belgium to Seattle every day. Most flights depart in the morning, with 7:00 am the most common departure time and 45% of flights departing in the morning.

How many direct flights to Seattle are there each week?

Each week there are around 6,269 direct flights from within Belgium to Seattle. The most common day for departures is Thursday, with 16% of flights taking off on this day.

Good to know

Low season

January

High season

July
Best time to beat the crowds with an average 5% drop in price.
Most popular time to fly with an average 25% increase in price.

FAQs - booking Seattle flights

  • How far is Seattle from central Seattle?

    Central Seattle is 11 miles away from Seattle.

  • What is the name of Seattle’s airport?

    When flying to Seattle, you'll arrive at Seattle (SEA). The airport is also known as Seattle-Tacoma Intl, Seattle/Tacoma, or Seattle/Tacoma Intl.

  • How does KAYAK find such low prices on flights to Seattle?

    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 to Seattle.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to 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 to Seattle?

    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 Seattle with an airline and back with another airline.

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

    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 Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • Which airline offers the most flights to Seattle?

    Of the 10 airlines that fly to Seattle, Alaska Airlines offers the most flights, with around 3,441 per week, followed by Delta with 1,824 flights per week.

See more FAQs

Top tips for finding cheap flights to Seattle

  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest Seattle flight deals.

Prefer to fly non-stop to Seattle/Tacoma Intl?

Find which airlines fly direct to Seattle/Tacoma Intl, which days they fly and book direct flights.

Nonstop departures

Belgium to Seattle/Tacoma Intl

Monday

ANA, Aer Lingus, Aeromexico, +61 more

ANA, Aer Lingus, +62 more

Tuesday

ANA, Aer Lingus, Aeromexico, +61 more

ANA, Aer Lingus, +62 more

Wednesday

ANA, Aer Lingus, Aeromexico, +61 more

ANA, Aer Lingus, +62 more

Thursday

ANA, Aer Lingus, Aeromexico, +61 more

ANA, Aer Lingus, +62 more

Friday

ANA, Aer Lingus, Aeromexico, +60 more

ANA, Aer Lingus, +61 more

Saturday

ANA, Aer Lingus, Aeromexico, +62 more

ANA, Aer Lingus, +63 more

Sunday

ANA, Aer Lingus, Aeromexico, +61 more

ANA, Aer Lingus, +62 more

See more direct flights

Nonstop returns

Seattle/Tacoma Intl to Belgium

Monday

ANA, Aer Lingus, Aeromexico, +61 more

ANA, Aer Lingus, +62 more

Tuesday

ANA, Aer Lingus, Aeromexico, +61 more

ANA, Aer Lingus, +62 more

Wednesday

ANA, Aer Lingus, Aeromexico, +61 more

ANA, Aer Lingus, +62 more

Thursday

ANA, Aer Lingus, Aeromexico, +61 more

ANA, Aer Lingus, +62 more

Friday

ANA, Aer Lingus, Aeromexico, +60 more

ANA, Aer Lingus, +61 more

Saturday

ANA, Aer Lingus, Aeromexico, +62 more

ANA, Aer Lingus, +63 more

Sunday

ANA, Aer Lingus, Aeromexico, +61 more

ANA, Aer Lingus, +62 more

See more direct flights
See more direct flights

Top 5 airlines serving from Belgium to Seattle

 
See real verified KAYAK customer reviews for airlines flying to Seattle. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline from Belgium to Seattle. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with to Seattle? 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.
7.8
KLMOverall score based on 1569 reviews
7.3Food
7.8Boarding
7.2Entertainment
8.4Crew
7.6Comfort
Airline reviews

We left one hour late because of technical difficulties. The economy comfort seats are great for the price. The crew was mediocre, they do not provide a pleasant experience, they just deliver food and drinks and give orders, not very amicable, no service and hospitality focus.

8.0 ExcellentAnonymous, Feb 2024AMS - ATL
Read more about KLM reviews

We left one hour late because of technical difficulties. The economy comfort seats are great for the price. The crew was mediocre, they do not provide a pleasant experience, they just deliver food and drinks and give orders, not very amicable, no service and hospitality focus.

I thought KLM was the best airline but the Lima - Amsterdam was 1 hours late, the Brussels - Amsterdam was 2.30 hours late and the Amsterdam - Lima was 30 minutes late

The food was ok. The crew seemed like they were cranky. I had one guy get mad at me for passing in between the storage area to get to the other toilet. I can understand if it's not allowed but reprimanding me like I'm a student saying "This is the last time!" was not appropriate. During my meal time, there was a French family around me. No problems there but when we usually have meals, they are supposed to put their chair in the upright position. These people did not do it and the steward did not tell them to raise their seat in the upright position. However, I was told to do so! So, me and another person next to me had to eat with the monitor almost touching our faces. Furthermore, a lady in front of me was putting her feet up and preventing another elder passenger from putting her seat back. To make it worse, she was continuously hitting her back into her seat, shaking my monitor while I was watching a movie. A crew member did speak to her about it but then she accused me of pushing her seat forward! The crew member gave me a death stare and told me to stop pushing the seat forward. I did not even touch her seat at all, if I did, she would know it. Her boyfriend also stood up and tried to push her seat even further past the maximum decline to no avail. None of these people were reprimanded but the steward, some bald guy, was extremely friendly with them and did not even try to instruct them to do anything until it was time to land. I resisted the urge to really argue with them because I would have obviously been seen as the aggressor (I have no idea why). I hardly said anything on this flight except "more wine please" and "sorry" if I bumped into someone accidentally. Overall, it was an annoying flight and I had to resist the urge to yell at the steward and the people he was overly friendly with. The happiest moment of this flight was leaving it.

Overall a good experience. We were disappointed when we had to check our carry on due to the plane being full. KLM hadn’t notified us and we had valuable items in the carry on but they still made us check it. Some of the food was great and some was mediocre. Crew is really kind and funny.

The worst airline. Cancelled flight 30 min before boarding and rebooked on flight after 3 days.

It was nice to be on a legacy airline, people try at least.

The plane was clean and the staff was friendly. Food and drinks as expected on international flights. The entertainment system was old style, with a pullout controller, and selections not as extensive as on other flights.

one of my bags was drenched with fish smelling water and all my new clothes bought at dublin and the 23kg checked in bag were all gone waste with very pungent fish smell and also having stains

The Crew have no idea about the food they're serving the passengers. The Crew MUST be instructed before each flight about the menu that will be served to the passengers, whether the food is vegetarian or non-vegetarian, whether it is Halal, Kosher or not.

Everything in general was great, but we left 30 minutes late

The flight was half full and I presume that the next few days are even less busy not sure why they are still charging a premium to change a flight.

I loved how they arrange boarding (starting with people seated in back and moving to the front). Flight crew was very polite and welcoming. Seating was ok, I felt like there was enough leg space however it is noticeable when the passenger in front of you sets their seat back.

Short flight so not much to rate. Surprised I had to pay for a soda.

the room on the plane was good but that is because flight not sold the other three seat and I had room. the food in terrible.

The only problem was there are games on the entertaiment system. The guy behind me played poker the entire time and poking the back of my seat. I hope they remove these.

First the price I paid was excellent, my flight was full, but my seat was roomy. The one downside to the experience was they had games on the entertainment console. The guy behind me poked at my head about half the flight. I hope they get rid of this feature.

Very good need to offer better choice of food for business

They should. Heck planes more often not when they are suppose to be leaving causing delays

Flightl was good and on time. Only problem was the quality of the air in the cabin,didn’t appear to be clearing the air circulation.

Crew was fantastic got lovely food and plenty of water. Entertainment was good. Never had to ask for anything. Left on time and got to Seattle early. Luggage did not take long either.

So Iceland Air is one step above Spirit Airlines. They do not feed you unless you pay for it or are in Saga Class. So, bring your food. They have a drink service, but it's in a large Dixie cup. Ask for the can, that is the only way you'll get a real drink. Also, we missed our connecting flight so they put us up in a flea-bag motel. Don't get me wrong, the staff was nice and friendly, however, there was no shower gel or shampoo in the hotel. We have to go to the corner store to pick some up. The room was not in great shape. Holes in the bathroom, a badly repaired ceiling in the room. The window was warn out. So, you get the just of how bad it was.

Food and staff were excellent. Seats on Saga (business class) are comparable to domestic first class of US Airlines, regarding space and recline. Entertainment options had little international component.

Flight delayed Delay to the gate upon arrival Baggage took more than an hour so we missed our connecting!!! Terrible experience!

There is no food without paying $. Only soft drinks are included in your fare.

Some drinks and basic snack will be good. Water should be served at least once an hour. Blankets for folks who might be cold.

Pros: "Flight was relatively empty. Professional crew, comfortable seats"
Cons: "I think they skipped me with food service. Checking up on passengers who may have been sleeping would be nice. Headphones need to be purchased. Limited entertainment options."
Cons: "Communication about international COVID requirements before the day of departure."
Pros: "My seat cushion was out of alignment so not great. But I like the two side seat configuration."
Cons: "Boarding is a zoo. Board by row. It’s faster."
Pros: "Icelandair crew were very hospitable and accompodating"
Cons: "I have never sat in such a narrow seat. Literally could not put my hand down the side to pull out my seat belt. Two days later I still have sores from where the side of the seats hit my hips. Did not even provide complimentary peanuts."
Cons: "Took far too long for drinks service into the flight. Almost 2 hours in before drinks came around to me"

Boarding, comfort, food/drinks, entertainment and most of all an extremely courteous and friendly group of flight attendants made my 12 hour flight an absolute joy!

The bad part was 2 hour delay and we were seating in the airplane it was getting hot and uncomfortable But after they fixed the problem everything went so smooth Crew were amazing very nice polite and caring

Touchscreens do not work. WiFi did not work. Food is possibly the worst on any European airline. Drinks came by only four times on a cross-Atlantic. The plane was two hours late because—it was announced—Lufthansa didn't have enough large aircraft in their fleet to accommodate an on-time flight.

It was freezing in the airplane. Everyone was wearing everything they had with them. The crew acknowledged it was cold, but did nothing about it

The flight attendants were superb and the service was outstanding. Some passengers with small children were very rude and inconsiderate, kids were constantly crying and some were running around the aisle unsupervised.

Terrible. There was a rattling noise the whole flight. The internet didn't work after I paid. Boarding is very disorganized.

Horrible flight attendant in back of economy that screamed at me, have already reported to United. Horrible food - for Gluten free, why would you assume the person is vegetarian? I was served some kind of horrible curry bean paste and multiple cold rolls and soggy vegetables with no seasoning... um no!

The crew member put her luggage and boxes behind my seat so I was able to recline while the passenger in front of me did for 8 hours. My knees were forced against the seat for hours :(. Dude sitting next to me hasn't showered in weeks so I almost threw up.

Sorry my last review for prg to fra was for this flight. My prg to fra flight was fine but my second flight back to Washington DC was with a slow awful crew who wouldn’t come in a timely manner to take trash and take trash before serving coffee tea and was shoving other people’s bottles of water on me when we were not traveling together

Lufthansa was amazing. Definitely upgrade your seat if you can swing it - they take very good care of their passengers. Customs in DC is nothing short of a nightmare though. Stood in line waiting to go back through security for 30 minutes, had to RUN through and across two terminals to make my connection and only had 5 minutes to spare. Terrible. Very very poor coordination by the airport staff and CBP.

I would have preferred something lighter for the second meal. Maybe a small sandwich .

They cancelled our flight the morning of departure at 4:30am.

Coach seats are too tight. Seem designed for small people. Food different but OK. Staff helpful.

my original flight was cancelled the previous day, and i was rescheduled onto this flight, which left much earlier in the morning, impacting my previous evening and requiring me to get up much earlier in the morning to get to the airport online. This practice happens way way way too much, and it seems on every airline, though AA is probably the worst.

Spending 10 hours on a flight with no video or wifi access due to issues per stewardess was not enjoyable nor acceptable. Will follow up directly with the airline as well

I really did not like being ordered to pull my shade down by the attendants. One of them was very rude to me about it, standing there until I closed it like I was a child brusquely reaching across me to close an adjoining one. They claim it was so people who wanted to could sleep. It’s a 10:30am flight not a red eye. Closing your shade or leaving it up for natural light should be a choice. Ruined my flight!

My baggage did not arrived with me. Took 3 days to get it after so may calls and follow up

The crew was very attentive and kept busy serving a variety of treats!

Terrible. Flight was 3 hours delayed and I missed my other flight to my final destination

Offered vegetable curry when it was actually tofu which I don’t care for.

Book cheap flights from Belgium to Seattle

Recent round-trip flight deals

 
These are the cheapest round-trip flights to Seattle found on KAYAK in the last 72 hours.
9/14Sat
1 stopKLM
13h 15mBRU-SEA
9/29Sun
1 stopKLM
16h 05mSEA-BRU
$697
5/25Sat
1 stopDelta
15h 05mBRU-SEA
5/28Tue
1 stopDelta
24h 49mSEA-BRU
$698
5/26Sun
1 stopIcelandair
12h 50mBRU-SEA
5/29Wed
1 stopIcelandair
28h 50mSEA-BRU
$723
5/27Mon
1 stopIcelandair
15h 45mBRU-SEA
5/30Thu
1 stopIcelandair
12h 00mSEA-BRU
$735
7/10Wed
2 stopsBritish Airways
28h 55mBRU-SEA
12/10Tue
1 stopBritish Airways
12h 30mSEA-BRU
$794
7/12Fri
1 stopUnited Airlines
33h 55mBRU-SEA
12/10Tue
1 stopUnited Airlines
12h 50mSEA-BRU
$815
6/15Sat
1 stopUnited Airlines
16h 08mBRU-SEA
7/12Fri
2 stopsUnited Airlines
22h 15mSEA-BRU
$822
6/15Sat
1 stopLufthansa
16h 08mBRU-SEA
7/12Fri
1 stopLufthansa
23h 30mSEA-BRU
$853
8/10Sat
1 stopBritish Airways
15h 35mBRU-SEA
9/9Mon
2 stopsBritish Airways
20h 02mSEA-BRU
$944
7/12Fri
1 stopLufthansa
14h 15mBRU-SEA
12/13Fri
1 stopLufthansa
13h 40mSEA-BRU
$1,266

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Recent one-way flight deals

 
Only flying one-way? Below are some of the best deals for one-way flights to Seattle found on KAYAK in the last 72 hours.
6/12Wed
3 stops
56h 35mCRL-SEA
$429
6/12Wed
3 stops
59h 54mBRU-SEA
$431
6/12Wed
2 stops
18h 40mBRU-SEA
$461
6/12Wed
2 stops
18h 40mBRU-SEA
$462
6/12Wed
3 stops
44h 20mCRL-SEA
$466
6/23Sun
3 stops
36h 46mCRL-SEA
$477
6/12Wed
1 stopIcelandair
12h 50mBRU-SEA
$495
6/12Wed
1 stopIcelandair
15h 45mBRU-SEA
$639
7/22Mon
1 stopKLM
13h 05mBRU-SEA
$922
6/23Sun
4 stopsEthiopian Air
57h 40mBRU-SEA
$1,954

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Last minute flights to Seattle

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights to Seattle that are departing in the next 10 days.
5/19Sun
multi-stopIcelandair
12h 50mBRU-SEA
5/22Wed
multi-stopIcelandair
32h 55mSEA-BRU
$775
5/19Sun
multi-stopIcelandair
15h 45mBRU-SEA
5/22Wed
multi-stopIcelandair
28h 50mSEA-BRU
$821
5/19Sun
multi-stop
22h 09mBRU-SEA
5/22Wed
multi-stop
15h 05mSEA-BRU
$860
5/18Sat
multi-stopKLM
13h 00mBRU-SEA
5/21Tue
multi-stopKLM
16h 05mSEA-BRU
$871
5/18Sat
multi-stopKLM
13h 00mBRU-SEA
5/21Tue
multi-stopKLM
16h 35mSEA-BRU
$906
5/19Sun
multi-stop
19h 24mBRU-SEA
5/22Wed
multi-stop
15h 05mSEA-BRU
$910
5/18Sat
multi-stopDelta
13h 00mBRU-SEA
5/21Tue
multi-stopDelta
23h 35mSEA-BRU
$927
5/18Sat
multi-stopDelta
16h 34mBRU-SEA
5/21Tue
multi-stopDelta
23h 15mSEA-BRU
$932
5/19Sun
multi-stopAmerican Airlines
25h 00mBRU-SEA
5/22Wed
multi-stopAmerican Airlines
22h 18mSEA-BRU
$1,043
5/19Sun
multi-stopAmerican Airlines
22h 09mBRU-SEA
5/21Tue
multi-stopAmerican Airlines
32h 45mSEA-BRU
$1,074

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Flights to Seattle

Destination:

Seattle (SEA)United States

Return flight deals:

Seattle - Belgium

Cabin classes: