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Portugal

$295+ 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 7/27. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — LIS
May 6 — May 131
Tue 5/6
Tue 5/13
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 May 1, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$686
(FlightHub)

One-way from

$295
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$1,151
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. 19% potential increase in price ($246 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($40 potential savings vs. average RT price).
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Average for round-trip flights in May 2025
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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 May 1, 2025.

This FlightHub deal was found by Cheapflights users on 5/1. 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 10/134:05 pmDEN - OPO
1 stop24h 15mLufthansa
Tue 10/216:15 amOPO - DEN
1 stop15h 05mLufthansa
Deal found 5/1$686
This oojo deal was found by Cheapflights users on 4/30. 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.
Tue 9/27:50 pmDEN - OPO
1 stop31h 15mTurkish Airlines
Wed 9/104:50 pmOPO - DEN
1 stop32h 05mTurkish Airlines
Deal found 4/30$690
This FlightHub deal was found by Cheapflights users on 5/1. 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 10/134:05 pmDEN - OPO
1 stop24h 15mMultiple Airlines
Tue 10/218:40 amOPO - DEN
2 stops18h 36mMultiple Airlines
Deal found 5/1$692
This United Airlines deal was found by Cheapflights users on 5/1. 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 10/247:45 amDEN - OPO
2 stops19h 00mUnited Airlines
Sat 11/112:35 pmOPO - DEN
1 stop14h 50mUnited Airlines
Deal found 5/1$697
This American Airlines deal was found by Cheapflights users on 5/1. 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 10/135:02 pmDEN - OPO
2 stops15h 53mAmerican Airlines
Tue 10/2112:20 pmOPO - DEN
2 stops18h 18mAmerican Airlines
Deal found 5/1$712
This Scandinavian Airlines deal was found by Cheapflights users on 5/1. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/2510:45 amDEN - LIS
2 stops40h 15mScandinavian Airlines
Mon 11/34:55 pmLIS - DEN
2 stops37h 03mScandinavian Airlines
Deal found 5/1$722
This American Airlines deal was found by Cheapflights users on 4/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/16:35 pmDEN - LIS
1 stop21h 35mAmerican Airlines
Wed 10/226:35 amLIS - DEN
2 stops16h 50mAmerican Airlines
Deal found 4/29$723
This Lufthansa deal was found by Cheapflights users on 4/30. 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.
Mon 9/226:00 pmDEN - LIS
2 stops21h 05mLufthansa
Mon 11/312:30 pmLIS - DEN
1 stop34h 25mLufthansa
Deal found 4/30$724
This Air Canada deal was found by Cheapflights users on 4/30. 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.
Sat 9/205:40 pmDEN - LIS
1 stop32h 40mAir Canada
Mon 11/311:00 amLIS - DEN
1 stop30h 28mAir Canada
Deal found 4/30$726
This Finnair deal was found by Cheapflights users on 4/30. 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 8/106:35 pmDEN - LIS
1 stop21h 30mFinnair
Tue 8/264:30 pmLIS - DEN
2 stops36h 45mFinnair
Deal found 4/30$727
This United Airlines deal was found by Cheapflights users on 5/1. 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 10/159:40 amDEN - LIS
1 stop16h 40mUnited Airlines
Mon 10/276:10 amLIS - DEN
1 stop15h 30mUnited Airlines
Deal found 5/1$733
This FlightHub deal was found by Cheapflights users on 5/1. 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 10/177:50 pmDEN - LIS
1 stop36h 40mTurkish Airlines
Sat 10/255:55 amLIS - DEN
1 stop19h 00mTurkish Airlines
Deal found 5/1$735

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 May 1, 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

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Mon 10/13

4:05 pm-11:20 pm

1 stop24h 15m

Porto

Tue 10/21

6:15 am-2:20 pm

1 stop15h 05m

$686

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Tue 9/2

7:50 pm-10:05 am

1 stop31h 15m

Porto

Wed 9/10

4:50 pm-5:55 pm

1 stop32h 05m

$690

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Mon 10/13

4:05 pm-11:20 pm

1 stop24h 15m

Porto

Tue 10/21

8:40 am-8:16 pm

2 stops18h 36m

$692

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Fri 10/24

7:45 am-9:45 am

2 stops19h 00m

Porto

Sat 11/1

12:35 pm-9:25 pm

1 stop14h 50m

$697

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Mon 10/13

5:02 pm-3:55 pm

2 stops15h 53m

Porto

Tue 10/21

12:20 pm-11:38 pm

2 stops18h 18m

$712

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Sat 10/25

10:45 am-10:00 am

2 stops40h 15m

Lisbon Humberto Delgado

Mon 11/3

4:55 pm-10:58 pm

2 stops37h 03m

$722

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Wed 10/1

6:35 pm-11:10 pm

1 stop21h 35m

Lisbon Humberto Delgado

Wed 10/22

6:35 am-4:25 pm

2 stops16h 50m

$723

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Mon 9/22

6:00 pm-10:05 pm

2 stops21h 05m

Lisbon Humberto Delgado

Mon 11/3

12:30 pm-3:55 pm

1 stop34h 25m

$724

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Sat 9/20

5:40 pm-9:20 am

1 stop32h 40m

Lisbon Humberto Delgado

Mon 11/3

11:00 am-10:28 am

1 stop30h 28m

$726

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Sun 8/10

6:35 pm-11:05 pm

1 stop21h 30m

Lisbon Humberto Delgado

Tue 8/26

4:30 pm-10:15 pm

2 stops36h 45m

$727

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

Showing 1-10 of 58 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, January is the cheapest month in which you can book a flight from Colorado to Portugal (average of $612). Flying from Colorado to Portugal in June is currently the most expensive (average of $1,178). 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 May 1, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Colorado to Portugal as you normally would.

Rainfall in Portugal by month

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

In terms of precipitation, rainfall in Portugal ranges from 0.2 - 4.8 inches per month. December is typically the wettest month, when rainfall can reach 4.8 in. July is typically the driest time to visit Portugal when rainfall is around 0.2 in.

Temperature in Portugal by month

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

If weather is an important factor for your trip to Portugal, 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 51.8 F).

Reviews of airlines servicing Portugal

Get insights into the airlines that provide service to Portugal. 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 Portugal. Reviews last updated May 1, 2025.
Read through reviews of airlines operating flights from Colorado to Portugal, such as Delta, KLM and Finnair. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,934 reviews

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

7.9

Crew

8.5

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,934 reviews
Delta
8.0
Very good
7,934 reviews

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

7.9

Crew

8.5

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,334 reviews
Delta
8.0
Very good
7,934 reviews

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

7.9

Crew

8.5

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Finnair
7.6
Good
1,275 reviews
Delta
8.0
Very good
7,934 reviews

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

7.9

Crew

8.5

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
SWISS
7.5
Good
1,589 reviews
Delta
8.0
Very good
7,934 reviews

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

7.9

Crew

8.5

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,696 reviews
Delta
8.0
Very good
7,934 reviews

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

7.9

Crew

8.5

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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.

  • 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 Aer Lingus ($427), Icelandair ($449), and Lufthansa ($477).

  • 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, January is the cheapest month in which you can book a flight from Colorado to Portugal (average of $612). Flying from Colorado to Portugal in June is currently the most expensive (average of $1,178). 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 May 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$464Average$651FlexibilityNo cancel feeOn-time76%
Virgin AtlanticCheapest$491Average$1,177FlexibilityNo cancel feeOn-time72%
KLMCheapest$516Average$891FlexibilityNo cancel feeOn-time75%
Turkish AirlinesCheapest$555Average$676FlexibilityNo cancel feeOn-time77%
DeltaCheapest$558Average$1,049FlexibilityNo cancel feeOn-timeN/A
Air FranceCheapest$569Average$922FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$570Average$858FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$597Average$1,041FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$627Average$977FlexibilityNo cancel feeOn-time67%
LufthansaCheapest$641Average$1,057FlexibilityNo cancel feeOn-time76%

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