SEA - BLL

$443 Find Cheap Flights from Seattle to Billund

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Billund departing on 8/1. 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 Billund

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Billund, 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 Seattle to Billund, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$480
Overall average: $712
Delta
Tue 4/14Fri 4/24
SEA - BLL • 2 stops
Cheapest one-way
$443
United Airlines
Sat 8/1
SEA - BLL • 2 stops
Top airlines
Delta
Cheapest • from $480 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Seattle and Billund. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Reykjavik (KEF)
Cheapest • Avg $443 (round-trip)
Reykjavik (KEF)
Shortest trip • 13h 05m (one-way)
Insights
Insights
Insights
Insights
When to travel
February
Cheapest • 27% price drop
August
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Billund!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Seattle to Billund (SEA-BLL)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Billund 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 Seattle to Billund

Tue, Apr 14 - Fri, Apr 24
Delta Logo
7:15 am - 11:20 am
SEA
-
BLL
19h 05m
2 stops
Delta Logo
6:00 am - 11:45 am
BLL
-
SEA
14h 45m
1 stop
$480Delta
Thu, Apr 16 - Fri, Apr 24
KLM Logo
5:35 pm - 10:55 am
SEA
-
BLL
32h 20m
1 stop
KLM Logo
6:00 am - 11:45 am
BLL
-
SEA
14h 45m
1 stop
$488KLM
Tue, Apr 14 - Fri, Apr 24
Delta Logo
7:15 am - 11:20 am
SEA
-
BLL
19h 05m
2 stops
Delta Logo
10:15 am - 8:43 pm
BLL
-
SEA
19h 28m
2 stops
$491Delta
Sun, Apr 12 - Thu, Apr 23
Delta Logo
10:25 pm - 9:35 am
SEA
-
BLL
26h 10m
2 stops
Delta Logo
6:00 am - 4:30 pm
BLL
-
SEA
19h 30m
1 stop
$492Delta
Sat, Apr 18 - Tue, Apr 28
Delta Logo
5:35 pm - 9:35 am
SEA
-
BLL
31h 00m
1 stop
Delta Logo
10:15 am - 8:43 pm
BLL
-
SEA
19h 28m
2 stops
$498Delta
Sun, Apr 12 - Sun, Apr 26
Delta Logo
10:25 pm - 9:35 am
SEA
-
BLL
26h 10m
2 stops
Delta Logo
6:40 am - 6:30 pm
BLL
-
SEA
20h 50m
2 stops
$502Delta
Sun, Apr 12 - Wed, Apr 22
Delta Logo
10:25 pm - 9:35 am
SEA
-
BLL
26h 10m
2 stops
Delta Logo
10:15 am - 8:43 pm
BLL
-
SEA
19h 28m
2 stops
$503Delta
Sun, Apr 12 - Tue, Apr 28
British Airways Logo
8:20 pm - 9:50 am
SEA
-
BLL
28h 30m
1 stop
British Airways Logo
3:20 pm - 11:35 am
BLL
-
SEA
29h 15m
1 stop
$517British Airways
Thu, Apr 16 - Sun, Apr 26
Delta Logo
7:15 am - 9:35 am
SEA
-
BLL
17h 20m
2 stops
Delta Logo
6:40 am - 8:46 pm
BLL
-
SEA
23h 06m
2 stops
$523Delta
Mon, Apr 13 - Tue, Apr 28
Delta Logo
7:15 am - 1:30 pm
SEA
-
BLL
21h 15m
2 stops
Delta Logo
6:00 am - 8:04 pm
BLL
-
SEA
23h 04m
2 stops
$524Delta
Booking Insights

KAYAK's insights & trends for Seattle to Billund flights

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

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Seattle to Billund, 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 Seattle to Billund is February, where tickets cost $499 (return) on average. On the other hand, the most expensive months are January and June, where the average cost of round-trip tickets is $873 and $751 respectively.

Good to know

Low seasonJanuary
Cheapest flight$443
Best time to beat the crowds but there is an average 28% increase in price.
Most popular time to fly with an average 1% increase in price.
Flight from Seattle to Billund

When to book flights from Seattle to Billund

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

  • What is the cheapest flight from Seattle to Billund?

    In the last 3 days, the lowest price for a flight from Seattle to Billund was $443 for a one-way ticket and $480 for a round-trip.

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

    Yes, you’ll need a passport to travel to Billund from Seattle.

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

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

  • Which airline alliances offer flights from Seattle to Billund?

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

  • Which is the best airline for flights from Seattle to Billund, Delta or Lufthansa?

    The two airlines most popular with KAYAK users for flights from Seattle to Billund are Delta and Lufthansa. With an average price for the route of $757 and an overall rating of 7.9, Delta is the most popular choice. Lufthansa is also a great choice for the route, with an average price of $762 and an overall rating of 6.8.

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

    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 Seattle to Billund.

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

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

    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 Billund with an airline and back to Seattle with another airline. Booking your flights between Seattle and BLL 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 Seattle to Billund?

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

Reviews of the top airlines flying from Seattle to Billund

 
See real verified KAYAK customer reviews for airlines flying from Seattle to Billund. 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 Seattle to Billund? 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.
7.9
DeltaOverall score based on 8242 reviews
8.5Crew
7.8Entertainment
7.2Food
7.9Comfort
8.1Boarding
Airline reviews

Cabin was not pressurized properly. Several passengers had respiratory difficulties.

4.0 OkayFelix, Mar 2026
BOS - LGA
Read more Delta reviews

Cabin was not pressurized properly. Several passengers had respiratory difficulties.

I was happy that I was able to get a last minute flight but unfortunately my seat was a middle seat. Even with Delta Comfort I wasn't comfortable

There’s not much to say about a one hour flight. This is a connection from LA to RNO that I missed the previous night due to a mechanical check delay on my originating flight from JFK to LAX. The short flight itself was fine. Instructions from the pilot and crew were per usual. The coffee was barely lukewarm, which possibly was purposeful so we would down it quickly. Bags were already on carousel upon reaching baggage claim, which was excellent.

Flight was warm for first few hours and quite rough

Seat was extremely hard which made even a short 1 hour 20 minute flight fairly uncomfortable.

Everything was good except wifi and a leaking drink chiller. The floor was all wet and my bag was soaked. Did not notice until debarking. Have not heard back from Delta. Even though this was leg one of an international flight in first class, they denied access to their Sky Club - very disappointing!

The staff was fine. The plane was extremely tight, and I paid for the wifi and it did not work at all. I was actually going to ask for a refund.

two hour delay and the Delta representative on the PA system was unable to understand

An awesome flight crew. FC seat cushion just doesn’t cut it for a 3+ hour flight.

2+hrs delay without any reason provided and a cramped flight

Very good, i got two seats for myself, and was comfortable with the blanket i got

I hated the FRA Airport. Confusing signage, including the path to Immigration and Security It seems that the airport grew haphazardly over the years. I have been through multiple WW Hubs with much better experiences.

Economy Priority seats are extremely uncomfortable. There is no way to escape the boxed in feeling, particularely because the distance between to rows are too short, the hard edge of the front row is keeping legs confined. There is no elevated place to put your feet. I am of average, European size.

Terrible. Both flights were significantly delayed, no luggage, made me check my small bag when many, many others had much larger carry-ons, not even a bottle of water . . . I will not fly Discover Airlines again.

I was deceived on the Kayak site expecting a ticket, but instead finding a "standby" reservation. When I tried to change the ticket, I paid almost twice the price of the original ticket. Then, the airline refused to give me the reserved seat I had chosen and paid for. I think I deserve a refund for this leg of my trip because I was doubly charged and did not receive what I had paid for. I put in a complaint with Lufthansa because the ticket was sold originally sold as a flight they listed. Someone here needs to take responsibility.

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

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.

Service and food were excellent. Incredibly friendly and competent staff. Flight was delayed over and hour and I had to run between terminals to get my connecting flight.

Missed it by a couple minutes and couldn’t find an alternative flight so had to spend the night in DC and after much shuffling from 1 airline to another managed to get a United to Frankfurt.

There were only 2 toilets and one of them did not work in business class. We are not allowed to cross classes so had to wait in line to use the toilets!! The entertainment touch display was finicky and did not work all the time.

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

Information on your arrival and departure airports