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Portugal

$308+ 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 12/8. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — LIS
Dec 10 — Dec 171
Wed 12/10
Wed 12/17
1 adult, Economy
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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 November 10, 2025.

This United Airlines deal was found by Cheapflights users on 11/9. 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 12/77:00 amCOS - LIS
2 stops18h 10mUnited Airlines
Mon 12/155:00 amLIS - COS
2 stops23h 57mUnited Airlines
Deal found 11/9$536
This United Airlines deal was found by Cheapflights users on 11/9. 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 11/125:12 pmASE - LIS
2 stops33h 08mUnited Airlines
Mon 11/176:10 amLIS - ASE
2 stops19h 18mUnited Airlines
Deal found 11/9$542
This United Airlines deal was found by Cheapflights users on 11/7. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/155:56 pmDEN - LIS
1 stop33h 19mUnited Airlines
Wed 12/35:00 amLIS - DEN
1 stop18h 00mUnited Airlines
Deal found 11/7$562
This FlightHub deal was found by Cheapflights users on 11/9. 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 12/15:30 pmDEN - LIS
2 stops32h 50mMultiple Airlines
Mon 12/152:10 pmLIS - DEN
1 stop31h 25mMultiple Airlines
Deal found 11/9$564
This United Airlines deal was found by Cheapflights users on 11/7. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1811:15 amDEN - LIS
1 stop15h 05mUnited Airlines
Tue 11/2512:20 pmLIS - DEN
1 stop34h 40mUnited Airlines
Deal found 11/7$565
This KAYAK deal was found by Cheapflights users on 11/9. 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 12/14:05 pmDEN - LIS
2 stops24h 25mLufthansa
Fri 12/125:00 amLIS - DEN
2 stops21h 27mLufthansa
Deal found 11/9$567
This Delta deal was found by Cheapflights users on 11/7. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/186:00 amDEN - LIS
2 stops20h 00mDelta
Wed 11/265:00 amLIS - DEN
2 stops22h 38mDelta
Deal found 11/7$569
This Air Canada deal was found by Cheapflights users on 11/9. 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.
Tue 12/27:50 amDEN - LIS
2 stops18h 30mAir Canada
Thu 12/1110:55 amLIS - DEN
2 stops30h 28mAir Canada
Deal found 11/9$571
This Finnair deal was found by Cheapflights users on 11/6. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1812:10 pmDEN - LIS
1 stop13h 55mMultiple Airlines
Mon 1/124:10 pmLIS - DEN
2 stops33h 03mMultiple Airlines
Deal found 11/6$572
This Air Canada deal was found by Cheapflights users on 11/9. 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 11/295:30 pmDEN - LIS
1 stop32h 50mAir Canada
Fri 12/1211:20 amLIS - DEN
1 stop13h 46mAir Canada
Deal found 11/9$573
This United Airlines deal was found by Cheapflights users on 11/7. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/167:45 amDEN - LIS
2 stops17h 25mUnited Airlines
Tue 11/2512:20 pmLIS - DEN
1 stop34h 40mUnited Airlines
Deal found 11/7$574
This Finnair deal was found by Cheapflights users on 11/8. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/117:00 amDEN - LIS
1 stop19h 05mMultiple Airlines
Wed 11/1911:05 amLIS - DEN
1 stop19h 13mMultiple Airlines
Deal found 11/8$575

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 November 10, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

Gurufare
3 stars

Round-trip from

$562
(KAYAK)

One-way from

$308
(Kiwi.com)

Popular in

June

Cheapest in

November

Average price

$692
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 ($177 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($40 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 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 November 10, 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

Sun 12/7

7:00 am-8:10 am

2 stops18h 10m

Lisbon Humberto Delgado

Mon 12/15

5:00 am-9:57 pm

2 stops23h 57m

$536

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Wed 12/10

4:05 pm-10:15 am

1 stop11h 10m

Lisbon Humberto Delgado

Thu 12/25

10:55 am-7:55 pm

1 stop16h 00m

$564

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Mon 12/29

6:00 am-10:15 am

1 stop21h 15m

Lisbon Humberto Delgado

Tue 1/13

11:20 am-7:55 pm

1 stop15h 35m

$564

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Sat 11/15

5:56 pm-10:15 am

1 stop33h 19m

Lisbon Humberto Delgado

Wed 12/3

5:00 am-12:15 am

2 stops26h 15m

$566

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Tue 11/18

12:10 pm-9:05 am

1 stop13h 55m

Lisbon Humberto Delgado

Mon 1/12

4:10 pm-6:13 pm

2 stops33h 03m

$572

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Wed 12/10

6:15 am-10:35 am

2 stops21h 20m

Lisbon Humberto Delgado

Thu 12/25

5:00 am-4:44 pm

2 stops18h 44m

$574

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Sun 11/16

7:45 am-10:15 am

2 stops19h 30m

Lisbon Humberto Delgado

Tue 11/25

11:20 am-11:58 am

2 stops31h 38m

$585

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Mon 12/1

4:05 pm-10:15 am

1 stop11h 10m

Lisbon Humberto Delgado

Sun 12/14

5:00 am-7:29 pm

2 stops21h 29m

$611

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Thu 11/13

12:20 pm-8:55 am

1 stop13h 35m

Lisbon Humberto Delgado

Tue 11/18

5:00 am-8:38 pm

2 stops22h 38m

$615

DenverFunchal

DEN - FNC

DENFNC

Denver Intl

Mon 3/9

3:10 pm-9:35 am

2 stops36h 25m

Funchal Madeira

Mon 3/16

10:25 am-5:37 pm

2 stops37h 12m

$618

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/8

Showing 1-10 of 54 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 $508). 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 November 10, 2025.

It’s optimal to fly from Colorado to Portugal in the evening. By choosing this option you can save up to 25% 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 18h 10m. United Airlines provides one of the quickest options available for as low as $536. 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 Lufthansa ($398), Air Canada ($600), and KLM ($706).

  • 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 $508). 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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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 November 10, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$458Average$670FlexibilityNo cancel feeOn-time76%
Virgin AtlanticCheapest$539Average$984FlexibilityNo cancel feeOn-time72%
Turkish AirlinesCheapest$555Average$688FlexibilityNo cancel feeOn-time77%
DeltaCheapest$558Average$931FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$567Average$1,061FlexibilityNo cancel feeOn-time76%
Air FranceCheapest$569Average$883FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$588Average$939FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$594Average$1,265FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$596Average$1,061FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$596Average$928FlexibilityNo cancel feeOn-time67%

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