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$563+ Cheap flights from Colorado to Basel EuroAirport Swiss (BSL)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/15. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — BSL
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
1 adult, Economy
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Cheap flight deals from Colorado to Basel

Keep the following information in mind while searching for Colorado to Basel flight deals. Data was last updated July 31, 2025.

Round-trip from

$651
(British Airways)

One-way from

$610
(American Airlines)

Popular in

September

Cheapest in

February
From Colorado to Basel EuroAirport Swiss
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One-way flight from Colorado to Basel EuroAirport Swiss
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Highest demand for flights based on searches. 14% potential increase in price ($229 potential increase over avg. RT price).
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Cheapest flight prices on average. 17% potential price decrease ($201 potential savings vs. average RT price).
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Find flight deals from Colorado to Basel

Cheapest flights from Colorado to Basel
Explore the most affordable flight options available from Colorado to Basel. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 31, 2025.

This British Airways deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/15:25 pmDEN - BSL
1 stop16h 50mBritish Airways
Sun 12/146:35 amBSL - DEN
1 stop16h 55mBritish Airways
Deal found 7/30$651
This oojo deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/127:50 pmDEN - BSL
1 stop29h 50mTurkish Airlines
Thu 8/286:55 pmBSL - DEN
1 stop31h 00mTurkish Airlines
Deal found 7/31$701
This American Airlines deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2212:29 pmDEN - BSL
2 stops14h 31mAmerican Airlines
Thu 9/46:10 amBSL - DEN
1 stop18h 15mAmerican Airlines
Deal found 7/30$709
This United Airlines deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/274:15 pmDEN - BSL
1 stop12h 10mUnited Airlines
Wed 9/311:25 amBSL - DEN
1 stop12h 10mUnited Airlines
Deal found 7/30$733
This Gurufare deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/224:15 pmDEN - BSL
1 stop12h 10mLufthansa
Thu 9/411:30 amBSL - DEN
1 stop12h 05mLufthansa
Deal found 7/31$810
This Delta deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1210:19 amDEN - BSL
2 stops15h 11mDelta
Thu 8/2810:10 amBSL - DEN
2 stops20h 59mDelta
Deal found 7/30$901
This Mytrip deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/104:15 pmDEN - BSL
2 stops20h 25mMultiple Airlines
Tue 10/71:30 pmBSL - DEN
3 stops34h 05mMultiple Airlines
Deal found 7/31$1,224
This Austrian Airlines deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/277:45 amDEN - BSL
2 stops28h 00mAustrian Airlines
Wed 9/310:20 amBSL - DEN
2 stops41h 34mAustrian Airlines
Deal found 7/30$1,304
This KAYAK deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/2011:25 amDEN - BSL
2 stops15h 30mAir Canada
Fri 9/2611:30 amBSL - DEN
2 stops16h 24mAir Canada
Deal found 7/30$1,528

Cheapflights Fare Finder

 
Customize your flight search to find flights from Colorado to Basel that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 31, 2025.
Use the filters below to find and compare flights from Colorado to Basel EuroAirport Swiss that are best for you.

Fly from

Colorado

Fly to

Basel

Route

Depart

Return

Price

DenverBasel

DEN - BSL

DENBSL

Denver Intl

Mon 12/1

5:25 pm-6:15 pm

1 stop16h 50m

Basel EuroAirport Swiss

Sun 12/14

6:35 am-3:30 pm

1 stop16h 55m

$651

DenverBasel

DEN - BSL

DENBSL

Denver Intl

Tue 8/12

7:50 pm-9:40 am

1 stop29h 50m

Basel EuroAirport Swiss

Thu 8/28

6:55 pm-5:55 pm

1 stop31h 00m

$701

DenverBasel

DEN - BSL

DENBSL

Denver Intl

Fri 8/22

12:29 pm-11:00 am

2 stops14h 31m

Basel EuroAirport Swiss

Thu 9/4

6:10 am-4:25 pm

1 stop18h 15m

$709

DenverBasel

DEN - BSL

DENBSL

Denver Intl

Wed 8/27

4:15 pm-12:25 pm

1 stop12h 10m

Basel EuroAirport Swiss

Wed 9/3

11:25 am-3:35 pm

1 stop12h 10m

$733

DenverBasel

DEN - BSL

DENBSL

Denver Intl

Fri 8/22

4:15 pm-12:25 pm

1 stop12h 10m

Basel EuroAirport Swiss

Thu 9/4

11:30 am-3:35 pm

1 stop12h 05m

$810

DenverBasel

DEN - BSL

DENBSL

Denver Intl

Tue 8/12

10:19 am-9:30 am

2 stops15h 11m

Basel EuroAirport Swiss

Thu 8/28

10:10 am-11:09 pm

2 stops20h 59m

$901

DenverBasel

DEN - BSL

DENBSL

Denver Intl

Sun 8/10

4:15 pm-8:40 pm

2 stops20h 25m

Basel EuroAirport Swiss

Tue 10/7

1:30 pm-3:35 pm

3 stops34h 05m

$1,224

DenverBasel

DEN - BSL

DENBSL

Denver Intl

Wed 8/27

7:45 am-7:45 pm

2 stops28h 00m

Basel EuroAirport Swiss

Wed 9/3

10:20 am-7:54 pm

2 stops41h 34m

$1,304

DenverBasel

DEN - BSL

DENBSL

Denver Intl

Sat 9/20

11:25 am-10:55 am

2 stops15h 30m

Basel EuroAirport Swiss

Fri 9/26

11:30 am-7:54 pm

2 stops16h 24m

$1,528

DenverBasel

DEN - BSL

DENBSL

Denver Intl

Wed 10/15

12:29 pm-11:20 am

2 stops14h 51m

$563

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

Showing 1-10 of 15 results
1
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Best time to book a flight from Colorado to Basel

Have a flexible travel schedule? Discover the best time to fly to Basel from Colorado with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Colorado to Basel EuroAirport Swiss

What is the cheapest time of day to fly from CO to BSL?

Find hourly flight availability from Colorado to Basel. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 31, 2025.

When flying from Colorado to Basel EuroAirport Swiss, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Reviews of airlines servicing Basel

Get insights into the airlines that provide service to Basel. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Basel. Reviews last updated July 31, 2025.
Read through reviews of airlines operating flights from Colorado to Basel EuroAirport Swiss, such as Delta, Austrian Airlines, and Air France. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,981 reviews

Entertainment

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,981 reviews
Delta
8.0
Very good
7,981 reviews

Entertainment

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Austrian Airlines
7.6
Good
823 reviews
Delta
8.0
Very good
7,981 reviews

Entertainment

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Air France
7.5
Good
1,465 reviews
Delta
8.0
Very good
7,981 reviews

Entertainment

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,900 reviews
Delta
8.0
Very good
7,981 reviews

Entertainment

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Turkish Airlines
7.3
Good
3,933 reviews
Delta
8.0
Very good
7,981 reviews

Entertainment

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

Find useful and relevant information for your journey from Colorado to Basel. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Basel from Colorado?

    If you book a flight to Basel from Colorado, you will be flying to EuroAirport Swiss, which is the city’s only airport. Basel EuroAirport Swiss (BSL) is located 3.6 mi from the center of Basel.

  • What are the cheapest airlines to fly from Colorado to Basel EuroAirport Swiss one-way?

    The cheapest airlines for a one-way flight from Colorado to Basel EuroAirport Swiss are American Airlines ($610), British Airways ($611), and Lufthansa ($642).

  • What are the most popular routes from Colorado to Basel EuroAirport Swiss?

    Most travelers choose Denver Intl - Basel EuroAirport Swiss, Aspen Pitkin County - Basel EuroAirport Swiss or Colorado Springs - Basel EuroAirport Swiss when deciding on the best route from Colorado to Basel EuroAirport Swiss.

  • Can I find deals for flights from Colorado to Basel that include hotel bookings?

    Yes. In addition to deals on Colorado to Basel flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Colorado to Basel?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Colorado to Basel.

  • Can I find deals for business class flights from Colorado to Basel?

    Yes. Cheapflights offers flight deals from Colorado to Basel by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Colorado to Basel EuroAirport Swiss?

    Currently, January is the cheapest month in which you can book a flight from Colorado to Basel EuroAirport Swiss (average of $545). Flying from Colorado to Basel EuroAirport Swiss in June is currently the most expensive (average of $1,132). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top airline flying from Colorado to Basel

Discover the top airline that operate flights from Colorado to Basel. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$582Average$1,025FlexibilityNo cancel feeOn-time76%

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