BLL - SEA

$558 Find Cheap Flights from Billund to Seattle

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Billund to Seattle departing on 3/2. 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
1 adult, Economy, 0 bags

KAYAK searches 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 in flight searches from Billund to Seattle, 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 Billund to Seattle, as well as popular online travel agencies
Travelers love KAYAK
41 299 237 searches in the past 7 days on KAYAK

Save 23% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest round-trip
$558
Overall average: $662
Air France
mån 3/2mån 3/9
BLL - SEA • 1 stop
Top airlines
Air France
Cheapest • from $558 (round-trip)
Lufthansa
Best reviews • 6.8 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
2 weeks
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 24% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
December
Cheapest • 22% price drop
July
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Seattle!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Billund to Seattle (BLL-SEA)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Billund to Seattle 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.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Billund to Seattle

mån, mar 2 - mån, mar 9
Air France Logo
10:25 am - 11:35 am
BLL
-
SEA
34h 10m
1 stop
Air France Logo
3:10 pm - 2:35 pm
SEA
-
BLL
15h 25m
1 stop
$558Air France
tors, feb 26 - mån, mar 2
Multiple Airlines Logo
6:00 am - 11:40 am
BLL
-
SEA
14h 40m
1 stop
Multiple Airlines Logo
2:10 pm - 2:35 pm
SEA
-
BLL
15h 25m
1 stop
$559Multiple Airlines
tors, feb 26 - mån, mar 2
Multiple Airlines Logo
6:00 am - 11:40 am
BLL
-
SEA
14h 40m
1 stop
Multiple Airlines Logo
9:45 am - 11:20 am
SEA
-
BLL
16h 35m
2 stops
$566Multiple Airlines
tors, feb 26 - mån, mar 2
Multiple Airlines Logo
6:00 am - 2:44 pm
BLL
-
SEA
17h 44m
2 stops
Multiple Airlines Logo
2:10 pm - 2:35 pm
SEA
-
BLL
15h 25m
1 stop
$568Multiple Airlines
fre, feb 27 - tis, mar 3
Air France Logo
6:00 am - 11:40 am
BLL
-
SEA
14h 40m
1 stop
Air France Logo
1:30 pm - 2:35 pm
SEA
-
BLL
16h 05m
2 stops
$570Air France
fre, feb 27 - tis, mar 3
Air France Logo
10:25 am - 11:40 am
BLL
-
SEA
34h 15m
1 stop
Air France Logo
1:40 pm - 2:35 pm
SEA
-
BLL
15h 55m
1 stop
$571Air France
mån, mar 2 - mån, mar 9
Multiple Airlines Logo
6:00 am - 2:44 pm
BLL
-
SEA
17h 44m
2 stops
Multiple Airlines Logo
3:10 pm - 2:35 pm
SEA
-
BLL
15h 25m
1 stop
$572Multiple Airlines
tors, feb 26 - mån, mar 2
KLM Logo
6:00 am - 2:44 pm
BLL
-
SEA
17h 44m
2 stops
KLM Logo
9:45 am - 11:20 am
SEA
-
BLL
16h 35m
2 stops
$578KLM
tors, feb 26 - mån, mar 2
KLM Logo
6:00 am - 2:44 pm
BLL
-
SEA
17h 44m
2 stops
KLM Logo
9:45 am - 11:20 am
SEA
-
BLL
16h 35m
2 stops
$580KLM
mån, mar 2 - mån, mar 9
Lufthansa Logo
6:45 am - 10:43 pm
BLL
-
SEA
24h 58m
2 stops
Lufthansa Logo
7:00 am - 9:40 am
SEA
-
BLL
18h 40m
2 stops
$584Lufthansa
Booking Insights

KAYAK's insights & trends for Billund to Seattle flights

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

What is the cheapest month to fly from Billund to Seattle?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Billund 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 from Billund to Seattle is December, where tickets cost $554 (return) on average. On the other hand, the most expensive months are July and January, where the average cost of round-trip tickets is $1,018 and $939 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Billund to Seattle, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Billund to Seattle, you should book around 2 weeks before departure, which saves you about 24% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 8 weeks before departure.

Find deals

Good to know

Low seasonNovember
Cheapest flight$558
Best time to beat the crowds with an average 22% drop in price.
Most popular time to fly with an average 43% increase in price.
Flight from Billund to Seattle

When to book flights from Billund to Seattle

Are your dates flexible? Find out the best times to travel from Billund to Seattle 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 flights from Billund to Seattle

  • What is the cheapest flight from Billund to Seattle?

    In the last 3 days, the lowest price for a flight from Billund to Seattle was $558 for a round-trip ticket.

  • Do I need a passport to fly between Billund and Seattle?

    Yes

  • Which airports will I be using when flying from Billund to Seattle?

    Billund airport is called Billund and the only airport in Seattle is Seattle/Tacoma Intl.

  • Which aircraft models fly most regularly from Billund to Seattle?

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

  • Which airline alliances offer flights from Billund to Seattle?

    Star Alliance is the only airline alliance operating flights between Billund and Seattle.

  • How does KAYAK find such low prices on flights from Billund 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 from Billund to Seattle.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Billund 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 Billund 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 to Billund with another airline. Booking your flights between Billund and SEA 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 Billund 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 from Billund up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Billund to Seattle

 
See real verified KAYAK customer reviews for airlines flying from Billund to Seattle. 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 Billund 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.
6.8
LufthansaOverall score based on 7782 reviews
6.3Food
7.0Boarding
6.8Comfort
7.6Crew
6.5Entertainment
Airline reviews

Excellent service; they helped me reschedule so I can fly in an earlier flight

10.0 ExcellentAnonymous, Feb 2026
EWR - IND
Read more Lufthansa reviews

Excellent service; they helped me reschedule so I can fly in an earlier flight

Wonderful staff. The boarding process can be improved a little better by adequate prior communication but all in all they did fine. However the boarding gate was quite unfreindly to elderly and who needs help with sevral stairs.

Flight map did not work. Crew was great, food was good, plane took off on time and landed early. That's all I can ask.

I had a good comfortable seat. There was nearly an hour delay. There was an accident with the champagne, but I was well compensated. These things happen sometimes.

Very good. Comfortable and I felt well taken care of from start to finish

Bulkhead seats should not be an extra charge. They are extremely uncomfortable. And we missed our connecting flight due to slow luggage retreaval.

Not great - seats were very narrow and food was terrible.

Some of the crew was sassy and not super helpful. The food was okay, but it seems like they were all unprepared compared to my flight I did from JFK to Frankfurt

We missed our flight. There was not enough time built into the layover to get through immigration, customs, bagclaim, bag rechecking, and the long trip to another terminal and gate. Kayak really screwed up. We took the bus up to Wisconsin and then were picked up in Brookfield by private car. It was lucky we didnt miss the last bus out.

We were in premium economy seats that appeared to be locked in plae, No reclining. My aching back.

Everything you need to know for your flight from Billund to Seattle

Information on your arrival and departure airports

Billund (BLL)
Seattle (SEA)