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$575+ Cheap flights from Basel EuroAirport Swiss (BSL) to Colorado

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/10. Fares are subject to change and may not be available on all flights or dates of travel.
BSL — DEN
Jun 21 — Jun 281
Sat 6/21
Sat 6/28
1 adult, Economy
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Cheap flight deals from Basel to Colorado

Keep the following information in mind while searching for Basel to Colorado flight deals. Data was last updated June 16, 2025.

Round-trip from

$575
(American Airlines)

Popular in

September

Cheapest in

February

Average price

$772
From Basel EuroAirport Swiss to Colorado
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($39 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($19 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Find flight deals from Basel to Colorado

Cheapest flights from Basel to Colorado
Explore the most affordable flight options available from Basel to Colorado. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 16, 2025.

This American Airlines deal was found by Cheapflights users on 6/14. 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 10/106:00 amBSL - DEN
1 stop18h 25mAmerican Airlines
Mon 10/276:30 pmDEN - BSL
1 stop16h 40mAmerican Airlines
Deal found 6/14$575
This British Airways deal was found by Cheapflights users on 6/16. 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.
Thu 10/26:10 amBSL - DEN
1 stop18h 15mBritish Airways
Fri 10/179:03 amDEN - BSL
2 stops17h 57mBritish Airways
Deal found 6/16$577
This Delta deal was found by Cheapflights users on 6/14. 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.
Sun 10/126:15 amBSL - DEN
2 stops19h 14mDelta
Sat 10/253:45 pmDEN - BSL
2 stops15h 20mDelta
Deal found 6/14$628
This Lufthansa deal was found by Cheapflights users on 6/15. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/108:25 amBSL - DEN
1 stop13h 00mLufthansa
Mon 7/148:25 pmDEN - BSL
1 stop15h 10mLufthansa
Deal found 6/15$746
This United Airlines deal was found by Cheapflights users on 6/15. 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.
Thu 7/1711:30 amBSL - DEN
2 stops30h 34mUnited Airlines
Mon 7/217:50 amDEN - BSL
2 stops20h 35mUnited Airlines
Deal found 6/15$749
This Air Canada deal was found by Cheapflights users on 6/14. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/138:25 amBSL - DEN
2 stops32h 17mAir Canada
Sat 10/259:40 amDEN - BSL
2 stops17h 20mAir Canada
Deal found 6/14$750
This Turkish Airlines deal was found by Cheapflights users on 6/14. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/136:55 pmBSL - DEN
1 stop31h 00mTurkish Airlines
Sun 10/268:20 pmDEN - BSL
1 stop30h 40mTurkish Airlines
Deal found 6/14$905
This Mytrip deal was found by Cheapflights users on 6/15. 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.
Wed 7/308:10 pmBSL - COS
2 stops28h 26mLufthansa
Wed 8/63:35 pmCOS - BSL
2 stops36h 50mLufthansa
Deal found 6/15$1,026
This KLM deal was found by Cheapflights users on 6/14. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/1210:15 amBSL - DEN
2 stops17h 38mKLM
Sat 8/24:10 pmDEN - BSL
2 stops13h 40mKLM
Deal found 6/14$1,286
This Austrian Airlines deal was found by Cheapflights users on 6/16. 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.
Thu 7/3110:20 amBSL - DEN
2 stops16h 15mAustrian Airlines
Thu 8/711:25 amDEN - BSL
2 stops24h 20mAustrian Airlines
Deal found 6/16$1,384
This Kiwi.com deal was found by Cheapflights users on 6/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/316:10 amBSL - DEN
1 stop18h 15mMultiple Airlines
Wed 8/612:34 amDEN - BSL
2 stops36h 26mMultiple Airlines
Deal found 6/16$1,695
This Air Canada deal was found by Cheapflights users on 6/15. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/3011:25 amBSL - COS
3 stops18h 26mAir Canada
Wed 8/68:00 amCOS - BSL
3 stops18h 55mAir Canada
Deal found 6/15$1,715

Cheapflights Fare Finder

Customize your flight search to find flights from Basel to Colorado 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 June 16, 2025.
Use the filters below to find and compare flights from Basel EuroAirport Swiss to Colorado that are best for you.

Fly from

Basel

Fly to

Colorado

Route

Depart

Return

Price

BaselDenver

BSL - DEN

BSLDEN

Basel EuroAirport Swiss

Fri 10/10

6:00 am-4:25 pm

1 stop18h 25m

Denver Intl

Mon 10/27

6:30 pm-6:10 pm

1 stop16h 40m

$575

BaselDenver

BSL - DEN

BSLDEN

Basel EuroAirport Swiss

Thu 10/2

6:10 am-4:25 pm

1 stop18h 15m

Denver Intl

Sat 10/18

6:35 pm-10:50 pm

1 stop20h 15m

$577

BaselDenver

BSL - DEN

BSLDEN

Basel EuroAirport Swiss

Sun 10/12

6:15 am-5:29 pm

2 stops19h 14m

Denver Intl

Sat 10/25

3:45 pm-3:05 pm

2 stops15h 20m

$628

BaselDenver

BSL - DEN

BSLDEN

Basel EuroAirport Swiss

Thu 7/10

8:25 am-1:25 pm

1 stop13h 00m

Denver Intl

Mon 7/14

8:25 pm-7:35 pm

1 stop15h 10m

$746

BaselDenver

BSL - DEN

BSLDEN

Basel EuroAirport Swiss

Thu 7/17

11:30 am-10:04 am

2 stops30h 34m

Denver Intl

Mon 7/21

4:15 pm-12:25 pm

1 stop12h 10m

$749

BaselDenver

BSL - DEN

BSLDEN

Basel EuroAirport Swiss

Mon 10/13

8:25 am-8:42 am

2 stops32h 17m

Denver Intl

Sat 10/25

9:40 am-11:00 am

2 stops17h 20m

$750

BaselDenver

BSL - DEN

BSLDEN

Basel EuroAirport Swiss

Mon 10/13

6:55 pm-5:55 pm

1 stop31h 00m

Denver Intl

Sun 10/26

8:20 pm-10:00 am

1 stop30h 40m

$905

BaselColorado Springs

BSL - COS

BSLCOS

Basel EuroAirport Swiss

Wed 7/30

8:10 pm-4:36 pm

2 stops28h 26m

Colorado Springs

Wed 8/6

3:35 pm-12:25 pm

2 stops36h 50m

$1,026

BaselDenver

BSL - DEN

BSLDEN

Basel EuroAirport Swiss

Sat 7/12

10:15 am-7:53 pm

2 stops17h 38m

Denver Intl

Sat 8/2

4:10 pm-1:50 pm

2 stops13h 40m

$1,286

BaselDenver

BSL - DEN

BSLDEN

Basel EuroAirport Swiss

Thu 7/31

10:20 am-6:35 pm

2 stops16h 15m

Denver Intl

Thu 8/7

11:25 am-7:45 pm

2 stops24h 20m

$1,384

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/14

Showing 1-10 of 18 results
1
2

Best time to book a flight from Basel to Colorado

Have a flexible travel schedule? Discover the best time to fly to Colorado from Basel 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 Basel EuroAirport Swiss to Colorado

Rainfall in Colorado by month

Plan your trip to Colorado by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Colorado ranges from 0.5 - 2.3 inches per month. May is typically the wettest month, when rainfall can reach 2.3 in. January is typically the driest time to visit Colorado when rainfall is around 0.5 in.

Temperature in Colorado by month

Plan your trip to Colorado by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Colorado, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).

Reviews of airlines servicing Colorado

Get insights into the airlines that provide service to Colorado. 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 Colorado. Reviews last updated June 16, 2025.
See what other customers who have flown with Delta, KLM and Austrian Airlines from Basel to Colorado have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,963 reviews

Food

7.3

Crew

8.5

Overall

8.0

Entertainment

7.9

Boarding

8.2

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
7,963 reviews
Delta
8.0
Very good
7,963 reviews

Food

7.3

Crew

8.5

Overall

8.0

Entertainment

7.9

Boarding

8.2

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!
KLM
7.8
Good
1,361 reviews
Delta
8.0
Very good
7,963 reviews

Food

7.3

Crew

8.5

Overall

8.0

Entertainment

7.9

Boarding

8.2

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
804 reviews
Delta
8.0
Very good
7,963 reviews

Food

7.3

Crew

8.5

Overall

8.0

Entertainment

7.9

Boarding

8.2

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
8,801 reviews
Delta
8.0
Very good
7,963 reviews

Food

7.3

Crew

8.5

Overall

8.0

Entertainment

7.9

Boarding

8.2

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
3,852 reviews
Delta
8.0
Very good
7,963 reviews

Food

7.3

Crew

8.5

Overall

8.0

Entertainment

7.9

Boarding

8.2

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 Basel to Colorado. 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 from for flights from Basel to Colorado?

    If you book a flight to Colorado from Basel, you will be flying from 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 Basel EuroAirport Swiss to Colorado one-way?

    One-way options have recently been found by users for as low as $939 on British Airways. Other airlines that offer cheap prices include American Airlines from $961 and Austrian Airlines from $1,032 one-way.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Basel to Colorado 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 Basel EuroAirport Swiss to Colorado?

    Currently, October is the cheapest month in which you can book a flight from Basel EuroAirport Swiss to Colorado (average of $197). Flying from Basel EuroAirport Swiss to Colorado in March is currently the most expensive (average of $278). 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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