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Portugal

$280+ 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 4/28. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — LIS
Jan 20 — Jan 271
Tue 1/20
Tue 1/27
1 adult, Economy
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Cheap 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 December 21, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 12/19. 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.
Tue 12/3012:01 pmDEN - LIS
1 stop14h 04mBritish Airways
Tue 1/1311:05 amLIS - DEN
1 stop18h 19mBritish Airways
Deal found 12/19$564
This FlightHub deal was found by Cheapflights users on 12/21. 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.
Mon 12/294:05 pmDEN - LIS
1 stop11h 10mMultiple Airlines
Tue 1/1310:15 amLIS - DEN
1 stop14h 43mMultiple Airlines
Deal found 12/21$572
This KLM deal was found by Cheapflights users on 12/19. 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.
Tue 12/3011:59 pmDEN - LIS
1 stop25h 41mKLM
Tue 1/135:00 amLIS - DEN
2 stops19h 34mKLM
Deal found 12/19$573
This American Airlines deal was found by Cheapflights users on 12/21. 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.
Mon 12/297:00 amDEN - LIS
1 stop19h 05mAmerican Airlines
Tue 1/1311:05 amLIS - DEN
2 stops19h 11mAmerican Airlines
Deal found 12/21$580
This CheapOair deal was found by Cheapflights users on 12/19. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3011:59 pmDEN - LIS
2 stops25h 56mMultiple Airlines
Tue 1/133:25 pmLIS - DEN
2 stops30h 00mMultiple Airlines
Deal found 12/19$592
This KLM deal was found by Cheapflights users on 12/21. 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.
Mon 12/2910:54 amDEN - LIS
2 stops14h 06mKLM
Tue 1/135:00 amLIS - DEN
2 stops19h 34mKLM
Deal found 12/21$658
This Cheapflightsfares deal was found by Cheapflights users on 12/19. 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.
Mon 12/295:45 pmDEN - LIS
2 stops22h 45mLufthansa
Tue 1/137:00 pmLIS - DEN
2 stops26h 25mLufthansa
Deal found 12/19$715
This FlightHub deal was found by Cheapflights users on 12/20. 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.
Fri 12/264:05 pmDEN - LIS
1 stop11h 10mLufthansa
Wed 12/315:00 amLIS - DEN
1 stop18h 00mLufthansa
Deal found 12/20$893
This United Airlines deal was found by Cheapflights users on 12/19. 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.
Fri 12/263:55 pmDEN - FAO
1 stop13h 40mUnited Airlines
Sat 1/31:25 pmFAO - DEN
1 stop33h 35mUnited Airlines
Deal found 12/19$1,646
This KAYAK deal was found by Cheapflights users on 12/19. 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.
Fri 12/264:20 pmDEN - FAO
2 stops24h 30mLufthansa
Wed 12/316:05 amFAO - DEN
2 stops39h 30mLufthansa
Deal found 12/19$1,730
This CheapOair deal was found by Cheapflights users on 12/20. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/266:44 amDEN - FAO
2 stops20h 46mMultiple Airlines
Wed 12/312:10 pmFAO - DEN
2 stops57h 30mMultiple Airlines
Deal found 12/20$1,743
This Gurufare deal was found by Cheapflights users on 12/20. 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.
Wed 12/245:45 pmDEN - FAO
2 stops33h 40mLufthansa
Fri 1/26:05 amFAO - DEN
2 stops19h 50mLufthansa
Deal found 12/20$1,774

Find flight deals from Colorado to Portugal

Keep the following information in mind while searching for Colorado to Portugal flight deals. Data was last updated December 21, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

Gurufare
3 stars

Round-trip from

$499
(United Airlines)

One-way from

$280
(Cheapflightsfares)

Popular in

June

Cheapest in

November

Average price

$1,337
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.
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From Colorado to Portugal
Search Deals
One-way flight from Colorado to Portugal
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($174 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($39 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 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 December 21, 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

Fri 1/23

7:00 am-8:10 am

2 stops18h 10m

Lisbon Humberto Delgado

Tue 1/27

5:00 am-4:28 pm

2 stops18h 28m

$499

Colorado SpringsLisbon

COS - LIS

COSLIS

Colorado Springs

Wed 2/4

10:33 am-7:55 am

2 stops38h 22m

Lisbon Humberto Delgado

Wed 2/11

6:10 am-9:06 pm

2 stops21h 56m

$499

AspenLisbon

ASE - LIS

ASELIS

Aspen Pitkin County

Fri 1/16

7:35 am-8:10 am

2 stops17h 35m

Lisbon Humberto Delgado

Mon 1/19

11:20 am-4:52 pm

2 stops36h 32m

$537

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Tue 3/17

11:15 am-9:20 am

1 stop16h 05m

Lisbon Humberto Delgado

Tue 3/24

5:00 am-7:40 pm

2 stops20h 40m

$562

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Tue 3/17

6:40 am-9:00 am

1 stop20h 20m

Lisbon Humberto Delgado

Thu 3/26

5:00 am-10:18 pm

2 stops23h 18m

$566

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Wed 3/18

2:20 pm-9:05 am

1 stop12h 45m

Lisbon Humberto Delgado

Mon 3/23

4:10 pm-8:05 pm

2 stops33h 55m

$573

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Tue 4/21

12:30 pm-3:25 pm

2 stops19h 55m

Porto

Wed 4/29

5:00 am-9:27 pm

2 stops23h 27m

$615

AspenLisbon

ASE - LIS

ASELIS

Aspen Pitkin County

Wed 2/11

12:53 pm-7:55 am

2 stops36h 02m

Lisbon Humberto Delgado

Sun 2/15

10:50 am-1:08 pm

2 stops57h 18m

$617

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Tue 5/5

1:10 pm-3:30 pm

2 stops19h 20m

Porto

Wed 5/13

5:00 am-10:49 pm

2 stops24h 49m

$620

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Wed 1/21

11:49 am-8:10 am

1 stop13h 21m

Lisbon Humberto Delgado

Sun 1/25

10:50 am-6:10 pm

1 stop14h 20m

$622

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/20

Showing 1-10 of 55 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 $505). 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 December 21, 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 16h 29m. United Airlines provides one of the quickest options available for as low as $570. Airlines will cover a distance of 4826 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 ($251), British Airways ($326), and Air France ($435).

  • 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 $505). 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 December 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$458Average$668FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$514Average$1,069FlexibilityNo cancel feeOn-time69%
Virgin AtlanticCheapest$539Average$984FlexibilityNo cancel feeOn-time72%
DeltaCheapest$551Average$933FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$556Average$885FlexibilityNo cancel feeOn-time70%
LufthansaCheapest$565Average$1,081FlexibilityNo cancel feeOn-time76%
Air FranceCheapest$569Average$890FlexibilityNo cancel feeOn-time77%
Turkish AirlinesCheapest$574Average$689FlexibilityNo cancel feeOn-time77%
KLMCheapest$575Average$764FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$594Average$1,338FlexibilityNo cancel feeOn-time71%

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