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Portugal

$259+ 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 5/5. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — LIS
Jan 28 — Feb 41
Wed 1/28
Wed 2/4
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 29, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 12/28. 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 12/2912:01 pmDEN - LIS
1 stop14h 04mBritish Airways
Tue 1/1311:05 amLIS - DEN
1 stop18h 19mBritish Airways
Deal found 12/28$564
This KLM deal was found by Cheapflights users on 12/28. 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 12/2911:59 amDEN - LIS
1 stop14h 01mKLM
Tue 1/135:00 amLIS - DEN
2 stops18h 44mKLM
Deal found 12/28$566
This Air France deal was found by Cheapflights users on 12/28. 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 France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/2911:55 amDEN - LIS
2 stops16h 25mMultiple Airlines
Tue 1/135:00 amLIS - DEN
2 stops19h 34mMultiple Airlines
Deal found 12/28$570
This United Airlines deal was found by Cheapflights users on 12/28. 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 12/293:55 pmDEN - OPO
1 stop16h 00mUnited Airlines
Mon 1/512:30 pmOPO - DEN
1 stop34h 30mUnited Airlines
Deal found 12/28$927
This Gotogate deal was found by Cheapflights users on 12/28. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/295:45 pmDEN - LIS
1 stop22h 05mMultiple Airlines
Mon 1/57:55 pmLIS - DEN
2 stops31h 00mMultiple Airlines
Deal found 12/28$1,152
This Ovago deal was found by Cheapflights users on 12/29. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/301:48 pmCOS - LIS
2 stops17h 42mLufthansa
Tue 1/66:10 amLIS - COS
2 stops22h 56mLufthansa
Deal found 12/29$1,283
This Trip.com deal was found by Cheapflights users on 12/27. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/285:25 pmDEN - LIS
1 stop14h 25mMultiple Airlines
Thu 1/16:00 amLIS - DEN
2 stops46h 37mMultiple Airlines
Deal found 12/27$1,372
This FlightHub deal was found by Cheapflights users on 12/28. 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 12/294:20 pmDEN - OPO
1 stop13h 30mMultiple Airlines
Mon 1/512:55 pmOPO - DEN
2 stops32h 30mMultiple Airlines
Deal found 12/28$1,594
This Booking.com deal was found by Cheapflights users on 12/27. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/287:05 pmDEN - LIS
2 stops31h 15mAir Canada
Thu 1/19:00 amLIS - DEN
2 stops17h 55mAir Canada
Deal found 12/27$1,686
This Finnair deal was found by Cheapflights users on 12/27. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2812:01 pmDEN - LIS
1 stop14h 04mMultiple Airlines
Sun 1/411:05 amLIS - DEN
1 stop19h 05mMultiple Airlines
Deal found 12/27$1,689
This Expedia deal was found by Cheapflights users on 12/27. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/285:45 pmDEN - OPO
1 stop14h 30mMultiple Airlines
Sun 1/49:55 pmOPO - DEN
2 stops45h 50mMultiple Airlines
Deal found 12/27$2,002
This Ovago deal was found by Cheapflights users on 12/28. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/2910:05 amDEN - OPO
1 stop18h 45mTAP AIR PORTUGAL
Mon 1/56:40 pmOPO - DEN
1 stop21h 15mTAP AIR PORTUGAL
Deal found 12/28$2,234

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 29, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

Gurufare
3 stars

Round-trip from

$499
(United Airlines)

One-way from

$259
(American Airlines)

Popular in

June

Cheapest in

November

Average price

$1,341
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. 15% potential increase in price ($176 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($38 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 29, 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-6:18 pm

2 stops20h 18m

$499

AspenLisbon

ASE - LIS

ASELIS

Aspen Pitkin County

Thu 2/26

6:28 pm-10:15 am

2 stops32h 47m

Lisbon Humberto Delgado

Mon 3/2

11:20 am-6:39 pm

2 stops38h 19m

$500

Colorado SpringsLisbon

COS - LIS

COSLIS

Colorado Springs

Wed 2/11

1:25 pm-11:30 pm

2 stops27h 05m

Lisbon Humberto Delgado

Wed 2/18

5:00 am-2:30 pm

2 stops40h 30m

$502

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Tue 4/21

6:40 am-8:00 am

1 stop18h 20m

Lisbon Humberto Delgado

Wed 4/29

5:00 am-6:01 pm

2 stops20h 01m

$565

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Wed 4/15

6:40 pm-11:10 pm

1 stop21h 30m

Lisbon Humberto Delgado

Wed 5/6

4:35 pm-5:40 pm

2 stops32h 05m

$566

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Tue 1/20

7:45 am-8:10 am

2 stops17h 25m

Lisbon Humberto Delgado

Thu 1/29

5:00 am-6:24 pm

2 stops20h 24m

$568

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Tue 4/14

11:42 am-10:45 am

1 stop16h 03m

Lisbon Humberto Delgado

Tue 4/21

12:15 pm-11:31 am

2 stops30h 16m

$572

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

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Tue 1/27

5:25 pm-2:45 pm

1 stop14h 20m

Lisbon Humberto Delgado

Mon 2/2

6:35 pm-3:30 pm

1 stop27h 55m

$579

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Tue 2/10

5:25 pm-5:40 pm

1 stop17h 15m

Lisbon Humberto Delgado

Mon 2/16

6:35 pm-3:30 pm

1 stop27h 55m

$579

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/27

Showing 1-10 of 59 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 $857). 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.

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 18h 10m. United Airlines provides one of the quickest options available for as low as $499. 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 ($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 $857). 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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Alternative routes for Colorado to Portugal

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 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$458Average$668FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$514Average$1,069FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$555Average$888FlexibilityNo cancel feeOn-time70%
LufthansaCheapest$565Average$1,075FlexibilityNo cancel feeOn-time76%
Turkish AirlinesCheapest$574Average$689FlexibilityNo cancel feeOn-time77%
DeltaCheapest$575Average$964FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$575Average$764FlexibilityNo cancel feeOn-time75%
Virgin AtlanticCheapest$603Average$1,033FlexibilityNo cancel feeOn-time72%
Air CanadaCheapest$625Average$909FlexibilityNo cancel feeOn-time67%
Air FranceCheapest$643Average$910FlexibilityNo cancel feeOn-time77%

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