DEN - BIO

$378 Find Cheap Flights from Denver to Bilbao

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Denver to Bilbao departing on 10/24. 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 Bilbao

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

Cheapest round-trip
$704
Typical prices: $889-$775
Brussels Airlines, Air Canada
Mon 10/5Wed 10/21
DEN - BIO • 2 stops
Cheapest one-way
$378
United Airlines
Sat 10/24
DEN - BIO • 2 stops
Top airlines
Cheapest • from $721 (round-trip)
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Denver and Bilbao. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $674 (round-trip)
Shortest trip • 13h 26m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 36% price drop
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 Bilbao!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Denver to Bilbao (DEN-BIO)

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

Mon, Oct 5 - Wed, Oct 21
Multiple Airlines Logo
11:25 am - 4:00 pm
DEN
-
BIO
20h 35m
2 stops
Multiple Airlines Logo
6:50 am - 4:58 pm
BIO
-
DEN
18h 08m
2 stops
$704Multiple Airlines
Mon, Oct 5 - Wed, Oct 21
Multiple Airlines Logo
4:05 pm - 11:25 pm
DEN
-
BIO
23h 20m
1 stop
Multiple Airlines Logo
6:50 am - 4:58 pm
BIO
-
DEN
18h 08m
2 stops
$705Multiple Airlines
Mon, Oct 5 - Wed, Oct 21
Multiple Airlines Logo
4:05 pm - 11:25 pm
DEN
-
BIO
23h 20m
1 stop
Multiple Airlines Logo
6:50 am - 11:08 pm
BIO
-
DEN
24h 18m
2 stops
$707Multiple Airlines
Wed, Jul 29 - Wed, Feb 24
Multiple Airlines Logo
4:15 pm - 11:25 pm
DEN
-
BIO
23h 10m
1 stop
Multiple Airlines Logo
9:25 am - 7:55 pm
BIO
-
DEN
18h 30m
2 stops
$715Multiple Airlines
Mon, Oct 5 - Wed, Oct 21
Lufthansa Logo
4:05 pm - 11:25 pm
DEN
-
BIO
23h 20m
1 stop
Lufthansa Logo
6:50 am - 3:40 pm
BIO
-
DEN
16h 50m
1 stop
$721Lufthansa
Wed, Jul 29 - Wed, Feb 24
Lufthansa Logo
4:15 pm - 11:25 pm
DEN
-
BIO
23h 10m
1 stop
Lufthansa Logo
7:25 am - 2:35 pm
BIO
-
DEN
15h 10m
1 stop
$723Lufthansa
Sun, Oct 11 - Fri, Oct 16
United Airlines Logo
7:32 am - 4:00 pm
DEN
-
BIO
24h 28m
2 stops
United Airlines Logo
6:45 am - 6:46 pm
BIO
-
DEN
20h 01m
2 stops
$737United Airlines
Wed, Jul 29 - Wed, Feb 24
Delta Logo
6:35 am - 9:50 am
DEN
-
BIO
19h 15m
2 stops
Delta Logo
6:50 am - 5:35 pm
BIO
-
DEN
18h 45m
2 stops
$742Delta
Sun, Oct 11 - Fri, Oct 16
United Airlines Logo
5:40 pm - 11:25 pm
DEN
-
BIO
21h 45m
1 stop
United Airlines Logo
6:45 am - 12:58 am
BIO
-
DEN
26h 13m
2 stops
$751United Airlines
Sat, Oct 17 - Mon, Oct 26
United Airlines Logo
11:25 am - 10:10 am
DEN
-
BIO
38h 45m
2 stops
United Airlines Logo
12:45 pm - 5:00 pm
BIO
-
DEN
35h 15m
1 stop
$765United Airlines
Booking Insights

KAYAK's insights & trends for Denver to Bilbao flights

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

How much is a round-trip flight from Denver to Bilbao?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Denver to Bilbao departing in October.

What is the cheapest month to fly from Denver to Bilbao?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Denver to Bilbao, 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 Denver to Bilbao is February, where tickets cost $573 (return) on average. On the other hand, the most expensive months are December and June, where the average cost of round-trip tickets is $1,365 and $1,178 respectively.

Good to know

Low seasonJanuary
Cheapest flight$378
Best time to beat the crowds with an average 3% drop in price.
Most popular time to fly with an average 32% increase in price.
Flight from Denver to Bilbao

When to book flights from Denver to Bilbao

Are your dates flexible? Find out the best times to travel from Denver to Bilbao 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 Denver to Bilbao

  • What is the cheapest flight from Denver to Bilbao?

    In the last 3 days, the lowest price for a flight from Denver to Bilbao was $378 for a one-way ticket and $704 for a round-trip.

  • Do I need a passport to fly between Denver and Bilbao?

    A passport is required to fly from Denver to Bilbao.

  • Which airports will I be using when flying from Denver to Bilbao?

    Denver and Bilbao are both served by 1 main airport. You will leave Denver from Denver Intl and will be arriving at Bilbao.

  • Which aircraft models fly most regularly from Denver to Bilbao?

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

  • Which airline alliances offer flights from Denver to Bilbao?

    Star Alliance is the only airline alliance operating flights between Denver and Bilbao.

  • Which is the best airline for flights from Denver to Bilbao, United Airlines or Lufthansa?

    The two airlines most popular with KAYAK users for flights from Denver to Bilbao are United Airlines and Lufthansa. With an average price for the route of $886 and an overall rating of 7.4, United Airlines is the most popular choice. Lufthansa is also a great choice for the route, with an average price of $873 and an overall rating of 6.8.

  • How does KAYAK find such low prices on flights from Denver to Bilbao?

    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 Denver to Bilbao.

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

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

    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 Bilbao with an airline and back to Denver with another airline. Booking your flights between Denver and BIO 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 Denver to Bilbao?

    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 Bilbao from Denver 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 Denver to Bilbao

 
See real verified KAYAK customer reviews for airlines flying from Denver to Bilbao. 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 Denver to Bilbao? 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.
7.4
United AirlinesOverall score based on 9683 reviews
7.3Comfort
8.1Crew
6.6Food
7.1Entertainment
7.7Boarding
Airline reviews

Was great in general, try to respect time and excuses when slight changes have been made, appreciated!

8.0 ExcellentAnonymous, Apr 2026
DEN - IAD
Read more United Airlines reviews

Was great in general, try to respect time and excuses when slight changes have been made, appreciated!

Really hard landing... as in slammed into the runway then hit the brakes really hard ...

Putting people that close to the bathroom, where you have to look into the bathroom as people are exiting and entering was not great and the smell was also not great. I know the airlines are desperate for more chairs, but that seat is a crime.

Every staff member was professional, friendly and courteous. The pizza twist was ok. It was warm but too much dough.

one staffer was frustrated (it happen); the flight was late and the pilot mentioned they'll make amend but the snacks were the same, other than that the aircraft was clean and everything went smooth, no complaints

Wonderful in-seat entertainment with seatback screens and huge selection of quality movies. The ability to bluetooth connect headphones was amazing.

No seat back entertainment. And app had a hard time getting entertainment loaded.

ticket agent lady wás very helpful , she arranged wheel chair for my elderly mother

Flight left on time and we arrived 25 minutes early! There was a gate available when we arrived so early on a busy Sunday afternoon! Flight attendants came around twice with the drinks cart.

Sitting on the runway after we land for almost two hours! Not sure if we should blame United or Just Dumpy Vance.

Flight was delayed by several hours and then cancelled due to weather. But Staff was very helpful getting me on a different flight. United should offer food coupons and tooth brush and paste for stranded passengers

I upgraded to the business class cabin. It was the poorest business class I have ever experienced. No access to any business lounge in Tampa airport. Seats are not comfortable. I had a window seat and had to step/crawl over the next seat. Food was mediocre and service below average for business class. Bathroom location was ridiculous. No place to wait. I cannot believe I paid this kind of money and will never fly Lufthansa Discover again. They really should reimburse me somehow.

Boarding was disorganized. The door to one to the toilets wouldn’t lock. The plane was shockingly cramped, and clearly used for domestic flights due to the menus for items to sell domestic travelers. United should be ashamed of its small seats, tiny unclean toilets, and money grubbing stance toward services, compared to Lufthansa, Emirates, and most international carriers United is awful.

Catastrophic experience the gate selected customers were picked up to.pay 70 eur for overweight 1-2 kg. While some others were let to board without chcking their carry on bags. Unecessaey drama by Lufthansa that brings nothing just hating them by customers.

Was never allowed on and not refunded the full amount of the ticket plus charged a $300 processing fee.

Terrible. Lost our luggage for 4 days. Did not advise passengers there was a strike in Barcelona Airport and had zero personnel on hand at airport to advise passengers on where to go to file claims. We had to fend for ourselves. No assistance at all other than an online claims submission process that we had to find out about on our own.

Lufthansa cancelled our flight from Los Angeles to Naples Italy on March 10 for scheduled flight on March 12 Very stressful experience trying to arrange alternatives. Will never fly again with Lufthansa

Everything could have been better. What needed to be wrong with United went wrong

The staff was bit rude when I asked for an extra drink after one beer, asked for one wine glass.

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

Everything you need to know for your flight from Denver to Bilbao

Information on your arrival and departure airports