Find cheap flights from Seattle to Brussels - Compare and Save

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Everything you should know

Nonstop flights
Not available
There are currently no direct flights between Seattle and Brussels. You'll need to take a connecting flight to reach the destination.
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When to book
13 weeks
in advance
Our data shows that travelers who book at least 13 weeks in advance save around 50% compared to booking last minute.
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Insights
When to travel
February
Cheapest • 28% price drop
April
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Toronto Pearson Intl (YYZ)
Cheapest • Avg $579 (round-trip)
Amsterdam Schiphol (AMS)
Shortest trip • 13h 19m (one-way)
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Cheap Flights from Seattle to Brussels (SEA-BRU)

 

Cheap flights from Seattle to Brussels with top airlines, updated regularly. Compare round-trip, one-way, direct and last-minute deals.

Multiple Airlines Logo
SEA  Seattle/Tacoma Airport-BR1 Roanoke 8040 Plantation Rd
4941 mimulti-stop
Multiple Airlines Logo
BR1  Roanoke 8040 Plantation Rd-SEA Seattle/Tacoma Airport
4941 mimulti-stop
Multiple Airlines

Price, demand and travel trends for Seattle to Brussels flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

What's the cheapest day of the week to fly from Seattle to Brussels?

Based on deals KAYAK users found in the last 12 months, Monday is the cheapest day of the week to fly from Seattle to Brussels. It’s 16% cheaper than the average day, while Saturday is the most expensive, with prices 16% higher.

What’s the cheapest month to fly from Seattle to Brussels?

•February is the cheapest month to fly from Seattle to Brussels at $496 round-trip.
•June ($1,217) and August ($910) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 145% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are flights from Seattle to Brussels the cheapest?

Flights from Seattle to Brussels are cheapest 13 weeks before departure. Booking in this window typically costs about 50% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

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Key details for Seattle to Brussels flights

Low season

June
Beat the crowds with an average 50% drop in travelers.
The most popular month to fly with an average 66% increase in travelers.

When to book flights from Seattle to Brussels

Are your dates flexible? Find out the best times to travel from Seattle to Brussels based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Your Seattle to Brussels flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

  • What cabin classes can I book on flights from Seattle to Brussels?

    Four cabin classes are available on flights from Seattle to Brussels:

    • Economy Class
    • Premium Economy Class
    • Business Class
    • First Class

    Prices vary by airline.

  • How long is a flight from Seattle to Brussels?

    A nonstop flight from Seattle to Brussels takes 00m, covering 4,941 miles.

  • Do I need a passport to fly from Seattle to Brussels?

    Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

  • How much should I expect to pay for a Seattle to Brussels flight?

    Round-trip flights from Seattle to Brussels range from $527 to $871, with an average of $685 over the past 12 months. Anything below $527 counts as a good deal.

  • How expensive are last-minute Seattle to Brussels flights?

    Last-minute fares on this route (booked within two weeks of departure) run 42% above the $685 route average. Book 13 weeks before departure for the lowest fares.

  • What car rental options are available in Brussels?

    Since Brussels is served by multiple airports, car rental options and rates can vary depending on which one you fly into.
    Near Brussels Bruxelles-National Airport (BRU) — daily rates from around $19:

    • Alamo
    • Hertz
    • keddy by Europcar
    • Europcar
    • Sixt

    Near Charleroi Brussels Airport (CRL) — daily rates from around $22:

    • keddy by Europcar
    • Europcar
    • Hertz
    • Sixt
    • Thrifty

  • Which airports can I use when flying from Seattle to Brussels?

    Flights from Seattle to Brussels usually depart from Seattle/Tacoma Intl (SEA) and may arrive at several airports in Brussels area, including Brussels Bruxelles-National (BRU) and Charleroi Brussels (CRL).

  • Which airports do connecting flights from Seattle to Brussels pass through?

    One-stop flights from Seattle to Brussels most commonly connect through:

    • Reykjavik Keflavik Intl (KEF) - 38% of one-stop connections
    • Frankfurt am Main (FRA) - 15% of one-stop connections
    • Amsterdam Schiphol (AMS) - 14% of one-stop connections
    • Munich Franz Josef Strauss (MUC) - 14% of one-stop connections

  • Can I save money by using flexible dates for flights from Seattle to Brussels?

    Yes. Flexible dates can save you up to 28% on flights from Seattle to Brussels. Monday is the cheapest departure day at $581 round-trip on average, while Saturday is the most expensive at $799, a difference of $218.

    KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • How much time can I save by choosing a different layover airport from Seattle to Brussels?

    Flying via Amsterdam Schiphol (AMS) gives the shortest average 1-stop total travel time at 13h 19m, compared with 13h 24m via Munich Franz Josef Strauss (MUC) and 13h 33m via Frankfurt am Main (FRA).

  • What is the time difference between Seattle and Brussels?

    Brussels is 9 hours ahead of Seattle (Central European Time vs Pacific Time). Plan for the time shift when scheduling connections or first-day activities.

  • What popular places can I visit in Brussels?

    Some of the most popular sights in Brussels are Grand Place, King Baudouin Stadium and Place Sainte-Catherine. These are among the most viewed places in Brussels on KAYAK.

Your guide to booking Seattle to Brussels flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates are flexible, aim for a Monday departure and avoid flying on Saturday. On this route, Monday flights average $581, about $218 less than Saturday fares (27% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 13 weeks before you fly. On this route, that window historically saves about 50% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your Seattle to Brussels trip for February. Fares historically average $496 round-trip in that month - typically $721 less than the most expensive month, which is June (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Brussels Bruxelles-National Airport.

    • NH Brussels Airport
    • Crowne Plaza Brussels Airport By IHG

More options for your flight from Seattle to Brussels

Complete your trip to Brussels with a hotel stay or car rental

Car rentals in Brussels
Hotels in Brussels
Vacations in Brussels