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Portugal

$213+ 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
Feb 7 — Feb 141
Sat 2/7
Sat 2/14
1 adult, Economy
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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 January 8, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

Gurufare
3 stars

Round-trip from

$448
(British Airways)

One-way from

$213
(Delta)

Popular in

June

Cheapest in

November

Average price

$745
Provider with most accurate pricing for Denver Intl-Lisbon Humberto Delgado flight deals.
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Provider most trusted by Cheapflights users for Denver Intl-Lisbon Humberto Delgado flights.
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From Colorado to Portugal
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One-way flight from Colorado to Portugal
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Highest demand for flights based on searches. 16% potential increase in price ($186 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($39 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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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 January 8, 2026.

This British Airways deal was found by Cheapflights users on 1/6. 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.
Tue 4/76:40 pmDEN - OPO
1 stop31h 25mBritish Airways
Wed 4/228:20 amOPO - DEN
2 stops22h 19mBritish Airways
Deal found 1/6$448
This Gotogate deal was found by Cheapflights users on 1/8. 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 3/2311:15 amDEN - OPO
2 stops19h 35mMultiple Airlines
Tue 3/316:20 amOPO - DEN
1 stop15h 00mMultiple Airlines
Deal found 1/8$449
This oojo deal was found by Cheapflights users on 1/8. 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.
Mon 3/21:39 pmCOS - LIS
2 stops22h 16mBritish Airways
Wed 3/187:05 amLIS - COS
2 stops22h 54mBritish Airways
Deal found 1/8$458
This FlightHub deal was found by Cheapflights users on 1/8. 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 3/235:20 pmDEN - OPO
1 stop13h 30mLufthansa
Tue 3/316:20 amOPO - DEN
1 stop15h 00mLufthansa
Deal found 1/8$462
This KAYAK deal was found by Cheapflights users on 1/6. 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.
Mon 4/204:05 pmDEN - OPO
1 stop24h 20mLufthansa
Fri 5/86:20 amOPO - DEN
1 stop15h 00mLufthansa
Deal found 1/6$464
This Gotogate deal was found by Cheapflights users on 1/6. 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.
Wed 1/144:20 pmDEN - OPO
1 stop13h 55mMultiple Airlines
Tue 1/206:00 amOPO - DEN
2 stops35h 23mMultiple Airlines
Deal found 1/6$467
This United Airlines deal was found by Cheapflights users on 1/6. 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 3/237:45 amDEN - OPO
2 stops19h 45mUnited Airlines
Tue 3/316:00 amOPO - DEN
2 stops23h 15mUnited Airlines
Deal found 1/6$468
This Iberia deal was found by Cheapflights users on 1/6. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/1412:28 pmDEN - OPO
2 stops24h 32mIberia
Tue 1/208:40 pmOPO - DEN
2 stops32h 54mIberia
Deal found 1/6$472
This Air Canada deal was found by Cheapflights users on 1/8. 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 3/231:25 pmDEN - OPO
2 stops17h 25mAir Canada
Tue 3/318:40 amOPO - DEN
2 stops32h 35mAir Canada
Deal found 1/8$476
This Kiwi.com deal was found by Cheapflights users on 1/7. 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.
Wed 2/114:20 pmDEN - LIS
1 stop15h 55mLufthansa
Wed 2/185:00 amLIS - DEN
2 stops21h 31mLufthansa
Deal found 1/7$477
This Delta deal was found by Cheapflights users on 1/6. 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 4/77:30 amDEN - OPO
2 stops24h 55mDelta
Thu 4/235:00 amOPO - DEN
2 stops25h 15mDelta
Deal found 1/6$480
This oojo deal was found by Cheapflights users on 1/8. 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.
Sun 2/221:39 pmCOS - LIS
2 stops25h 06mBritish Airways
Sun 3/17:05 amLIS - COS
2 stops23h 54mBritish Airways
Deal found 1/8$483

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 January 8, 2026.
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

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Tue 4/7

6:40 pm-9:05 am

1 stop31h 25m

Porto

Wed 4/22

8:20 am-11:39 pm

2 stops22h 19m

$448

Colorado SpringsLisbon

COS - LIS

COSLIS

Colorado Springs

Mon 3/2

1:39 pm-6:55 pm

2 stops22h 16m

Lisbon Humberto Delgado

Wed 3/18

7:05 am-11:59 pm

2 stops22h 54m

$458

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Mon 3/23

7:45 am-9:30 am

2 stops19h 45m

Porto

Tue 3/31

6:00 am-11:43 am

3 stops36h 43m

$468

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Wed 4/8

6:40 am-3:25 pm

2 stops25h 45m

Porto

Tue 4/21

4:20 pm-10:00 am

2 stops24h 40m

$480

Colorado SpringsLisbon

COS - LIS

COSLIS

Colorado Springs

Sun 2/22

1:39 pm-9:45 pm

2 stops25h 06m

Lisbon Humberto Delgado

Sun 3/1

7:05 am-11:59 pm

2 stops23h 54m

$483

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Mon 4/13

6:40 pm-7:50 pm

1 stop18h 10m

Porto

Mon 4/20

11:45 am-4:30 pm

1 stop35h 45m

$483

Colorado SpringsLisbon

COS - LIS

COSLIS

Colorado Springs

Mon 4/20

6:20 am-8:00 am

2 stops18h 40m

Lisbon Humberto Delgado

Sun 5/10

5:35 am-9:22 pm

2 stops22h 47m

$484

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Mon 4/13

10:36 am-7:50 pm

2 stops26h 14m

Porto

Thu 4/23

7:55 pm-4:30 pm

1 stop27h 35m

$488

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Tue 4/7

8:40 am-7:30 pm

2 stops27h 50m

Porto

Thu 4/23

7:55 pm-4:30 pm

1 stop27h 35m

$488

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Sun 4/12

9:18 am-8:20 pm

2 stops28h 02m

Porto

Tue 4/21

8:40 pm-4:30 pm

1 stop26h 50m

$488

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/7

Showing 1-10 of 60 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 $503). Flying from Colorado to Portugal in June is currently the most expensive (average of $1,088). 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 19h 45m. British Airways provides one of the quickest options available for as low as $468. Airlines will cover a distance of 4747 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 ($325), 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 $503). Flying from Colorado to Portugal in June is currently the most expensive (average of $1,088). 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 January 8, 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$458Average$668FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$514Average$1,056FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$555Average$892FlexibilityNo cancel feeOn-time70%
LufthansaCheapest$562Average$1,076FlexibilityNo cancel feeOn-time76%
Turkish AirlinesCheapest$574Average$689FlexibilityNo cancel feeOn-time77%
DeltaCheapest$575Average$989FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$599Average$761FlexibilityNo cancel feeOn-time75%
Virgin AtlanticCheapest$603Average$1,177FlexibilityNo cancel feeOn-time72%
Air CanadaCheapest$625Average$913FlexibilityNo cancel feeOn-time67%
Air FranceCheapest$655Average$994FlexibilityNo cancel feeOn-time77%

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