BLL - SEA

$495 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 10/4. 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

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
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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

Sat, Oct 4 - Wed, Oct 8
Lufthansa Logo
6:00 am - 11:55 amBLL-SEA
14h 55m1 stop
Lufthansa Logo
7:00 am - 2:05 pmSEA-BLL
22h 05m2 stops
$495Lufthansa
Find Deal
Sat, Oct 4 - Wed, Oct 8
Lufthansa Logo
6:00 am - 11:55 amBLL-SEA
14h 55m1 stop
Lufthansa Logo
2:20 pm - 2:05 pmSEA-BLL
14h 45m1 stop
$508Lufthansa
Find Deal
Sat, Oct 4 - Wed, Oct 8
Lufthansa Logo
6:00 am - 11:55 amBLL-SEA
14h 55m2 stops
Lufthansa Logo
7:00 am - 12:25 pmSEA-BLL
20h 25m2 stops
$516Lufthansa
Find Deal
Wed, Sep 3 - Sun, Sep 7
Lufthansa Logo
6:00 am - 4:59 pmBLL-SEA
19h 59m1 stop
Lufthansa Logo
2:20 pm - 10:10 amSEA-BLL
34h 50m1 stop
$567Lufthansa
Find Deal
Wed, Sep 3 - Sun, Sep 7
Lufthansa Logo
6:00 am - 4:59 pmBLL-SEA
19h 59m2 stops
Lufthansa Logo
2:20 pm - 10:10 amSEA-BLL
34h 50m1 stop
$600Lufthansa
Find Deal
Sat, Sep 6 - Wed, Sep 10
Lufthansa Logo
6:00 am - 11:55 amBLL-SEA
14h 55m1 stop
Lufthansa Logo
6:50 pm - 12:25 pmSEA-BLL
32h 35m1 stop
$602Lufthansa
Find Deal
Sat, Sep 6 - Wed, Sep 10
Delta Logo
6:00 am - 2:45 pmBLL-SEA
17h 45m2 stops
Delta Logo
5:40 pm - 5:40 pmSEA-BLL
15h 00m1 stop
$658Delta
Find Deal
Sat, Sep 6 - Wed, Sep 10
Air Canada Logo
6:00 am - 6:36 pmBLL-SEA
21h 36m2 stops
Air Canada Logo
10:00 am - 2:05 pmSEA-BLL
19h 05m2 stops
$796Air Canada
Find Deal
Wed, Sep 3 - Sun, Sep 7
Delta Logo
6:00 am - 2:45 pmBLL-SEA
17h 45m2 stops
Delta Logo
1:40 pm - 1:30 pmSEA-BLL
14h 50m2 stops
$944Delta
Find Deal
Sat, Oct 4 - Wed, Oct 8
 Logo
11:10 am - 8:40 pmBLL-SEA
18h 30m2 stops
 Logo
3:45 pm - 7:05 pmSEA-BLL
18h 20m3 stops
$1,246
Find Deal
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’s the cheapest day of the week to fly from Billund to Seattle?

The average price of all round-trip flights from Billund to Seattle clicked on KAYAK for each day over the last 12 months.

If you are looking for a flight deal from Billund to Seattle, look for departures on Mondays and avoid leaving on a Thursday, as it's usually the priciest day. When flying back from Seattle, Friday is the cheapest day to fly and Wednesday is the most expensive.

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 January, where tickets cost $496 (return) on average. On the other hand, the most expensive months are July and August, where the average cost of round-trip tickets is $927 and $704 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 31% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 14 weeks before departure.

Good to know

Low seasonFebruary
Cheapest flight$495
Best time to beat the crowds with an average 17% drop in price.
Most popular time to fly with an average 46% 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 $2,335 for a one-way ticket and $495 for a round-trip.

  • 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, and SkyTeam are the airline alliances operating flights between Billund and Seattle, with Star Alliance being the most commonly used for this route.

  • 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 7337 reviews
6.8Comfort
7.0Boarding
7.6Crew
6.3Food
6.4Entertainment
Airline reviews

The male attendant has zero personality. It seemed like he was over worked or hated his job, not once did he smile or made any contact with the people on the plane. Strictly business and call it a day!

2.0 MediocreAnonymous, Aug 2025IAD - JAX
Read more Lufthansa reviews

The male attendant has zero personality. It seemed like he was over worked or hated his job, not once did he smile or made any contact with the people on the plane. Strictly business and call it a day!

Seat very cramped, could not recline. No cheese with meal. Staff very helpful.

The flight from Dulles to Munich was just okay. The seats were comfortable and extra foot room was noticeable in comfort plus. Disappointed in the booking in so much I requested an aisle seat and then was assigned a middle seat. The food was inedible. Movie choices were moderate. I usually fly Delta, but this WA flight was cheaper. Next time, I'll happily pay the extra to fly Delta.

They don’t give information on why a flight is delayed in a timely manner. Very frustrating.

The flight was ok but chargers did not work and the speakers in the back of the cabin did not either. But I am writing because the crew was really, really rude and not only rude but had the curtains always closed, forgot to clear our trays, the bathrooms were filthy and trash was building out, and one of the attendants even had her EARBUDS on while in the cabin. From movement it seemed like she was listening to music, so not even the safety aspect was there. My neighbor s English is not good and they were very dismissive of her. when we deplaned the crew in the back was just chatting with one another and the first class attendant was briefly and said goodnight. It is nice that a crew gets along so well, but they did not take care of passengers at all. They rushed through all the services and otherwise did not go through the cabin to offer water or anything else. i had the feeling of being unwelcome at a party. I am not a grumpy traveller but I thought you really needed to know. Thank you, Carin

Food was terrible. They ran out of options and gave me a bland undercooked pasta and veggies. Only middle seat was available to select although I paid extra. Baggage delayed at destination. Flight attendants not really helpful.

Flight was late arriving. So, we left 25 min late. Pilot made some time up during the flight. Therefore, we arrived alittle past original time.

Crew was great. But my flight was late arriving and as a result, I missed my connecting flight to Richmond. I had to catch a later flight. On a positive note, the attendants at the counter were extremely helpful in booking my later flight. They book my on the next flight to Richmond.

If the plain wait for the passenger it should wait for the baggage!!

The plane (Mitsubishi CRJ) felt old, creaking and not very new. The crew was okay. Hot water provision was broken so hot beverages could't be served.

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

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