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Portugal

$284+ 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 9/20. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — LIS
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
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 August 14, 2025.

Round-trip from

$593
(United Airlines)

One-way from

$284
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$1,000
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 ($40 potential savings vs. average RT price).
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Average for round-trip flights in August 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 August 14, 2025.

This United Airlines deal was found by Cheapflights users on 8/14. 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.
Tue 10/281:45 pmDEN - OPO
1 stop13h 45mUnited Airlines
Fri 11/712:35 pmOPO - DEN
1 stop15h 48mUnited Airlines
Deal found 8/14$593
This United Airlines deal was found by Cheapflights users on 8/13. 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.
Sun 11/231:45 pmDEN - OPO
1 stop12h 45mUnited Airlines
Mon 12/112:30 pmOPO - DEN
1 stop34h 30mUnited Airlines
Deal found 8/13$599
This United Airlines deal was found by Cheapflights users on 8/12. 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.
Tue 10/215:59 pmDEN - OPO
1 stop14h 46mUnited Airlines
Tue 11/46:00 amOPO - DEN
1 stop17h 00mUnited Airlines
Deal found 8/12$601
This Mytrip deal was found by Cheapflights users on 8/12. 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.
Mon 9/299:40 amDEN - OPO
2 stops22h 25mMultiple Airlines
Wed 10/157:15 amOPO - DEN
2 stops33h 49mMultiple Airlines
Deal found 8/12$609
This Booking.com deal was found by Cheapflights users on 8/12. 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.
Sat 12/65:30 pmDEN - OPO
2 stops58h 45mMultiple Airlines
Sat 12/1312:40 pmOPO - DEN
1 stop34h 20mMultiple Airlines
Deal found 8/12$671
This Scandinavian Airlines deal was found by Cheapflights users on 8/14. 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 11/82:00 pmDEN - LIS
2 stops24h 30mScandinavian Airlines
Sun 11/234:55 pmLIS - DEN
2 stops36h 20mScandinavian Airlines
Deal found 8/14$673
This Lufthansa deal was found by Cheapflights users on 8/13. 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.
Wed 10/224:15 pmDEN - OPO
1 stop24h 05mLufthansa
Thu 10/306:00 amOPO - DEN
1 stop17h 00mLufthansa
Deal found 8/13$677
This United Airlines deal was found by Cheapflights users on 8/14. 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.
Tue 10/218:01 amDEN - LIS
1 stop19h 29mUnited Airlines
Wed 10/295:00 amLIS - DEN
2 stops21h 04mUnited Airlines
Deal found 8/14$678
This Finnair deal was found by Cheapflights users on 8/14. 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.
Wed 11/512:21 pmDEN - LIS
2 stops20h 04mMultiple Airlines
Sun 11/1611:05 amLIS - DEN
2 stops15h 50mMultiple Airlines
Deal found 8/14$680
This CheapOair deal was found by Cheapflights users on 8/14. 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.
Sat 11/811:15 amDEN - LIS
1 stop14h 40mMultiple Airlines
Sun 11/235:00 amLIS - DEN
1 stop18h 00mMultiple Airlines
Deal found 8/14$683
This CrystalTravel deal was found by Cheapflights users on 8/14. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/74:20 pmDEN - LIS
1 stop14h 00mLufthansa
Sun 11/165:00 amLIS - DEN
1 stop18h 00mLufthansa
Deal found 8/14$684
This United Airlines deal was found by Cheapflights users on 8/14. 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.
Thu 10/308:00 amDEN - LIS
1 stop20h 15mUnited Airlines
Sat 11/155:00 amLIS - DEN
1 stop18h 00mUnited Airlines
Deal found 8/14$688

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 August 14, 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

Tue 10/28

1:45 pm-9:30 am

1 stop13h 45m

Porto

Fri 11/7

12:35 pm-9:23 pm

1 stop15h 48m

$593

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Tue 10/21

11:15 am-11:15 am

2 stops17h 00m

Porto

Tue 11/4

6:00 am-8:53 am

2 stops33h 53m

$601

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Tue 10/21

5:59 pm-3:45 pm

1 stop14h 46m

Porto

Tue 11/4

6:00 am-4:00 pm

1 stop17h 00m

$601

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Mon 9/29

9:40 am-3:05 pm

2 stops22h 25m

Porto

Wed 10/15

7:15 am-10:04 am

2 stops33h 49m

$609

DenverFaro

DEN - FAO

DENFAO

Denver Intl

Mon 9/29

9:40 am-4:05 pm

2 stops23h 25m

Faro

Mon 10/6

6:10 pm-3:35 pm

3 stops28h 25m

$639

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Sat 11/8

2:00 pm-9:30 pm

2 stops24h 30m

Lisbon Humberto Delgado

Sun 11/23

4:55 pm-10:15 pm

2 stops36h 20m

$673

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Sat 11/8

9:53 am-11:25 am

2 stops18h 32m

Lisbon Humberto Delgado

Tue 11/25

5:00 am-4:40 pm

2 stops18h 40m

$673

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Wed 10/22

4:15 pm-11:20 pm

1 stop24h 05m

Porto

Thu 10/30

6:00 am-5:00 pm

1 stop17h 00m

$677

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Tue 10/21

8:01 am-10:30 am

1 stop19h 29m

Lisbon Humberto Delgado

Wed 10/29

5:00 am-8:04 pm

2 stops21h 04m

$678

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Wed 11/5

12:21 pm-3:25 pm

2 stops20h 04m

Lisbon Humberto Delgado

Sun 11/16

11:05 am-7:55 pm

2 stops15h 50m

$680

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/12

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, 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 $1,128). 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 August 14, 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.

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.

  • 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 $1,128). 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 August 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$458Average$676FlexibilityNo cancel feeOn-time76%
Virgin AtlanticCheapest$539Average$1,177FlexibilityNo cancel feeOn-time72%
DeltaCheapest$548Average$938FlexibilityNo cancel feeOn-timeN/A
Turkish AirlinesCheapest$555Average$678FlexibilityNo cancel feeOn-time77%
Air FranceCheapest$569Average$888FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$577Average$893FlexibilityNo cancel feeOn-time70%
Scandinavian AirlinesCheapest$582Average$708FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$596Average$1,024FlexibilityNo cancel feeOn-time69%
KLMCheapest$599Average$787FlexibilityNo cancel feeOn-time75%
LufthansaCheapest$618Average$1,055FlexibilityNo cancel feeOn-time76%

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