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Portugal

$250+ Cheap flights from Colorado to Portugal

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 12/3. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — LIS
Dec 26 — Jan 21
Fri 12/26
Fri 1/2
1 adult, Economy
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Find flight deals from Colorado to Portugal

Cheapest flights from Colorado to Portugal
Explore the most affordable flight options available from Colorado to Portugal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 26, 2025.

This United Airlines deal was found by Cheapflights users on 11/26. 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 12/1011:48 amDEN - LIS
1 stop13h 22mUnited Airlines
Wed 12/246:10 amLIS - DEN
1 stop19h 45mUnited Airlines
Deal found 11/26$523
This United Airlines deal was found by Cheapflights users on 11/26. 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 12/108:05 amDEN - LIS
1 stop19h 10mUnited Airlines
Tue 12/2311:20 amLIS - DEN
1 stop15h 50mUnited Airlines
Deal found 11/26$534
This Mytrip deal was found by Cheapflights users on 11/25. 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 11/261:25 pmDEN - LIS
1 stop12h 30mMultiple Airlines
Wed 12/36:10 amLIS - DEN
1 stop15h 25mMultiple Airlines
Deal found 11/25$537
This Cheapflightsfares deal was found by Cheapflights users on 11/26. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/268:20 pmDEN - LIS
1 stop20h 10mLufthansa
Wed 12/36:10 amLIS - DEN
1 stop15h 25mLufthansa
Deal found 11/26$545
This United Airlines deal was found by Cheapflights users on 11/26. 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.
Mon 12/2911:59 pmDEN - LIS
1 stop27h 16mUnited Airlines
Tue 1/1311:20 amLIS - DEN
1 stop15h 35mUnited Airlines
Deal found 11/26$546
This United Airlines deal was found by Cheapflights users on 11/26. 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 12/108:05 amDEN - LIS
2 stops17h 05mUnited Airlines
Thu 12/1811:55 amLIS - DEN
2 stops18h 43mUnited Airlines
Deal found 11/26$549
This Mytrip deal was found by Cheapflights users on 11/23. 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.
Fri 12/54:10 pmDEN - LIS
2 stops58h 10mMultiple Airlines
Fri 1/165:00 amLIS - DEN
2 stops21h 26mMultiple Airlines
Deal found 11/23$558
This FlightHub deal was found by Cheapflights users on 11/24. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/27:20 pmDEN - OPO
1 stop31h 35mTurkish Airlines
Thu 12/1110:55 amOPO - DEN
1 stop37h 40mTurkish Airlines
Deal found 11/24$715
This Mytrip deal was found by Cheapflights users on 11/26. 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.
Thu 11/2711:15 amDEN - OPO
3 stops19h 00mMultiple Airlines
Thu 12/46:35 amOPO - DEN
2 stops20h 20mMultiple Airlines
Deal found 11/26$765
This Turkish Airlines deal was found by Cheapflights users on 11/24. 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.
Tue 12/211:21 pmDEN - OPO
2 stops27h 34mMultiple Airlines
Thu 12/114:10 pmOPO - DEN
1 stop32h 25mMultiple Airlines
Deal found 11/24$859
This Mytrip deal was found by Cheapflights users on 11/24. 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 11/261:25 pmDEN - FAO
3 stops27h 25mMultiple Airlines
Sun 12/711:15 amFAO - DEN
3 stops34h 20mMultiple Airlines
Deal found 11/24$922
This Kiwi.com deal was found by Cheapflights users on 11/25. 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.
Sat 11/296:22 amDEN - PDL
1 stop18h 33mMultiple Airlines
Tue 12/94:50 pmPDL - DEN
2 stops33h 23mMultiple Airlines
Deal found 11/25$957

Cheap flight deals from Colorado to Portugal

Keep the following information in mind while searching for Colorado to Portugal flight deals. Data was last updated November 26, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

Gurufare
3 stars

Round-trip from

$436
(oojo)

One-way from

$250
(Mytrip)

Popular in

June

Cheapest in

November

Average price

$676
Provider with most accurate pricing for Denver Intl-Lisbon Humberto Delgado flight deals.
Search Deals
Provider most trusted by Cheapflights users for Denver Intl-Lisbon Humberto Delgado flights.
Search Deals
From Colorado to Portugal
Search Deals
One-way flight from Colorado to Portugal
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($182 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($40 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Colorado to Portugal 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 November 26, 2025.
Use the filters below to find and compare flights from Colorado to Portugal that are best for you.

Fly from

Colorado

Fly to

Portugal

Route

Depart

Return

Price

Colorado SpringsLisbon

COS - LIS

COSLIS

Colorado Springs

Thu 1/29

8:40 am-9:20 am

2 stops17h 40m

Lisbon Humberto Delgado

Mon 2/2

11:20 am-12:22 pm

2 stops32h 02m

$489

AspenLisbon

ASE - LIS

ASELIS

Aspen Pitkin County

Fri 2/6

12:24 pm-5:30 pm

2 stops22h 06m

Lisbon Humberto Delgado

Tue 2/10

10:00 am-2:16 pm

2 stops35h 16m

$489

AspenLisbon

ASE - LIS

ASELIS

Aspen Pitkin County

Fri 2/6

7:00 am-8:10 am

2 stops18h 10m

Lisbon Humberto Delgado

Tue 2/10

5:00 am-9:59 pm

2 stops23h 59m

$496

AspenLisbon

ASE - LIS

ASELIS

Aspen Pitkin County

Thu 1/15

7:35 am-9:20 am

2 stops18h 45m

Lisbon Humberto Delgado

Mon 1/19

11:20 am-11:55 am

2 stops31h 35m

$504

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Mon 12/29

11:59 pm-10:15 am

1 stop27h 16m

Lisbon Humberto Delgado

Tue 1/13

11:20 am-2:02 pm

2 stops33h 42m

$527

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Wed 12/10

6:00 am-8:10 am

2 stops19h 10m

Lisbon Humberto Delgado

Tue 12/23

11:20 am-12:15 am

2 stops19h 55m

$549

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Wed 12/10

6:00 am-8:10 am

2 stops19h 10m

Lisbon Humberto Delgado

Fri 12/19

11:55 am-7:28 pm

1 stop14h 33m

$579

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Fri 1/9

6:00 am-8:50 am

1 stop19h 50m

Lisbon Humberto Delgado

Tue 1/13

4:10 pm-6:13 pm

2 stops33h 03m

$588

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Thu 12/11

9:45 am-8:10 am

2 stops15h 25m

Lisbon Humberto Delgado

Wed 12/24

5:00 am-4:00 pm

1 stop18h 00m

$605

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Thu 1/22

4:20 pm-1:20 pm

1 stop14h 00m

Lisbon Humberto Delgado

Mon 1/26

2:10 pm-2:35 pm

1 stop31h 25m

$617

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/24

Showing 1-10 of 51 results
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Best time to book a flight from Colorado to Portugal

Have a flexible travel schedule? Discover the best time to fly to Portugal 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 Portugal

What is the cheapest month to book a flight from Colorado to Portugal?

Currently, November is the cheapest month in which you can book a flight from Colorado to Portugal (average of $510). Flying from Colorado to Portugal in June is currently the most expensive (average of $1,005). 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.

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

Find hourly flight availability from Colorado to Portugal. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 26, 2025.

It’s optimal to fly from Colorado to Portugal in the evening. By choosing this option you can save up to 26% on the cost of your flight, compared to a flight at noon.

What is the cheapest day to fly from Colorado to Portugal?

Use this chart to determine the cheapest time to fly round-trip from Colorado to Portugal. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Colorado to Portugal flight should consider departing on Wednesday at noon when fares are most often at their lowest. Tuesday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Related info for your journey

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

  • How long is the flight from Colorado to Portugal?

    A quick flight from Colorado to Portugal can take about 17h 40m. Air Canada provides one of the quickest options available for as low as $489. Airlines will cover a distance of 4869 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from Colorado to Portugal one-way?

    The cheapest airlines for a one-way flight from Colorado to Portugal are Icelandair ($250), British Airways ($380), and United Airlines ($490).

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Colorado to Portugal 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 Portugal?

    Currently, November is the cheapest month in which you can book a flight from Colorado to Portugal (average of $510). Flying from Colorado to Portugal in June is currently the most expensive (average of $1,005). 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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See prices for flight routes from nearby airports that may be better suited for you.
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Top 10 airlines flying from Colorado to Portugal

Discover the top 10 airlines that operate flights from Colorado to Portugal. 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 November 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$458Average$666FlexibilityNo cancel feeOn-time76%
Virgin AtlanticCheapest$539Average$984FlexibilityNo cancel feeOn-time72%
DeltaCheapest$551Average$935FlexibilityNo cancel feeOn-timeN/A
Turkish AirlinesCheapest$555Average$688FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$555Average$925FlexibilityNo cancel feeOn-time70%
LufthansaCheapest$565Average$1,061FlexibilityNo cancel feeOn-time76%
Air FranceCheapest$569Average$892FlexibilityNo cancel feeOn-time77%
KLMCheapest$575Average$784FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$575Average$1,076FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$594Average$1,281FlexibilityNo cancel feeOn-time71%

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