Cheap flights from Seattle to Brussels from $395
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Brussels departing on 4/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Deals available from 900+ travel sites.
Big names and deals
Big names and deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customize your results.Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Find the cheapest flights from Seattle to Brussels
Cheap round-trip flights
Cheap one-way flights
Cheap last minute flights
Icelandair flights from Seattle to Brussels
Our best Icelandair deals on Seattle to Brussels flight tickets
Aer Lingus flights from Seattle to Brussels
Our best Aer Lingus deals on Seattle to Brussels flight tickets
See travel insights to Brussels from
How to get the cheapest flight ticket from Seattle to Brussels
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to Brussels?
In general, February is the cheapest month to fly from Seattle to Brussels. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $527. If you are unable to visit Brussels during the month of February, then departing from Seattle during the month January is also very affordable. Most momondo users find prices during this month for around $549.
What is the cheapest day to depart on your flight to Brussels?
On average, the least expensive day to fly to Brussels from Seattle is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $626. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Wednesday is the most expensive day to depart from Seattle because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $783.
What is the cheapest time of day to depart on your flight to Brussels?
According to our data, the cheapest time of day to fly to Brussels is in the morning. momondo users have found flights departing from Seattle to Brussels in the morning for as low as $668. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights at noon are often more expensive with an average ticket price of $738.
How far in advance should I book a flight to Brussels?
You are more likely to see cheaper flights to Brussels from Seattle when booking 19 weeks ahead of your departure date. In general, you can expect to find flights to Brussels for around $674 when searching 19 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Brussels from Seattle for as low as $586 on momondo.
What is the cheapest airline that flies from Seattle/Tacoma Intl to Brussels?
Lufthansa, Brussels Airlines, and United Airlines are the most popular carriers operating from Seattle/Tacoma Intl to Brussels
What airlines fly to Brussels?
Icelandair, British Airways and Lufthansa are the top three most popular airlines that fly to Brussels from Seattle according to our data. Icelandair is the first choice among our users, with 36% of people opting to fly with this airline when traveling to Brussels. Keep in mind that there are 10 different airlines that fly to Brussels on a routine basis, so you have a few additional options to choose from.
Cheap Seattle to Brussels flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Seattle to Brussels
How far is Seattle/Tacoma Intl to Brussels by plane?
A flight from Seattle/Tacoma Intl to Brussels will travel around 4931.7 mi. 11h 25m is a normal flight duration for this route.
When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Brussels?
Prices for flights from Seattle/Tacoma Intl Airport to Brussels refresh daily.
How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Brussels?
As of February 2025, there are 10 operators available to choose from for flights from Seattle/Tacoma Intl Airport to Brussels.
How old do you have to be to fly from Seattle/Tacoma Intl Airport to Brussels?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Seattle/Tacoma Intl Airport to Brussels.
What documentation or ID do you need to fly to Brussels?
The travel and health documents required for your trip to Brussels can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Brussels. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
Best airlines flying from Seattle to Brussels
Compare and see reviews for airlines that fly from Seattle to Brussels with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $402 | Free Cancellation | Rating 7.0 491 reviews | |||
| PriceFrom $501 | Free Cancellation | Rating 6.6 6,762 reviews | |||
| PriceFrom $501 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $526 | Free Cancellation | Rating 7.0 8,748 reviews | |||
| PriceFrom $529 | Free Cancellation | Rating 7.4 8,765 reviews | |||
| PriceFrom $532 | Free Cancellation | Rating 7.1 1,070 reviews | |||
| PriceFrom $535 | Free Cancellation | Rating 7.8 1,333 reviews | |||
| PriceFrom $561 | Free Cancellation | Rating 8.0 8,219 reviews | |||
| PriceFrom $565 | Free Cancellation | Rating 7.4 1,449 reviews | |||
| PriceFrom $580 | Free Cancellation | Rating 6.7 6,986 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from Seattle to Brussels?
It is quick and easy to find Seattle to Brussels flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Brussels that suits you.
Can I find flights from Seattle to Brussels with flexible booking policies on momondo?
Yes. momondo allows you to filter the results for Seattle to Brussels flights to just show those with flexible booking policies.
How can momondo help me find flights from Seattle to Brussels?
momondo helps you find the best flight between Seattle and Brussels by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.
I’m not ready to book a flight from Seattle to Brussels right now. Can momondo alert me if prices change?
If you are not ready to book a flight from Seattle to Brussels now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Brussels and let you know when they change.