HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Portugal

$258+ 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 3/7. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — LIS
Jan 7 — Jan 141
Wed 1/7
Wed 1/14
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Colorado to Portugal with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 8, 2025.

This United Airlines deal was found by Cheapflights users on 12/7. 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.
Mon 12/84:05 pmDEN - LIS
1 stop11h 10mUnited Airlines
Wed 12/246:10 amLIS - DEN
1 stop19h 45mUnited Airlines
Deal found 12/7$548
This Mytrip deal was found by Cheapflights users on 12/7. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/81:25 pmDEN - LIS
1 stop12h 55mAir Canada
Wed 12/2411:00 amLIS - DEN
2 stops38h 08mAir Canada
Deal found 12/7$550
This Delta deal was found by Cheapflights users on 12/6. 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.
Wed 12/107:10 amDEN - LIS
1 stop18h 30mDelta
Wed 12/245:00 amLIS - DEN
2 stops22h 08mDelta
Deal found 12/6$566
This United Airlines deal was found by Cheapflights users on 12/7. 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.
Mon 12/296:00 pmDEN - LIS
1 stop33h 15mUnited Airlines
Tue 1/1310:15 amLIS - DEN
1 stop16h 10mUnited Airlines
Deal found 12/7$581
This United Airlines deal was found by Cheapflights users on 12/7. 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 12/148:05 amDEN - LIS
1 stop19h 10mUnited Airlines
Wed 12/246:10 amLIS - DEN
1 stop19h 45mUnited Airlines
Deal found 12/7$595
This Mytrip deal was found by Cheapflights users on 12/5. 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.
Tue 12/911:15 amDEN - LIS
1 stop15h 05mMultiple Airlines
Sun 12/147:45 amLIS - DEN
1 stop37h 50mMultiple Airlines
Deal found 12/5$602
This United Airlines deal was found by Cheapflights users on 12/6. 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.
Thu 12/118:15 amDEN - LIS
2 stops18h 05mUnited Airlines
Wed 12/246:10 amLIS - DEN
1 stop19h 45mUnited Airlines
Deal found 12/6$607
This United Airlines deal was found by Cheapflights users on 12/7. 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 12/137:50 amDEN - LIS
2 stops19h 25mUnited Airlines
Wed 12/246:10 amLIS - DEN
1 stop19h 45mUnited Airlines
Deal found 12/7$608
This Booking.com deal was found by Cheapflights users on 12/6. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/912:33 pmDEN - FAO
2 stops22h 17mBritish Airways
Mon 12/1510:00 amFAO - DEN
2 stops43h 20mBritish Airways
Deal found 12/6$861
This oojo deal was found by Cheapflights users on 12/5. 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 12/1611:28 pmDEN - PDL
1 stop25h 27mMultiple Airlines
Mon 12/228:05 pmPDL - DEN
2 stops50h 47mMultiple Airlines
Deal found 12/5$1,313
This Mytrip deal was found by Cheapflights users on 12/6. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/91:25 pmDEN - FAO
2 stops16h 40mMultiple Airlines
Mon 12/154:35 pmFAO - DEN
3 stops32h 00mMultiple Airlines
Deal found 12/6$1,329
This oojo deal was found by Cheapflights users on 12/6. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3010:40 pmDEN - PDL
2 stops50h 15mMultiple Airlines
Tue 1/68:10 amPDL - DEN
2 stops34h 35mMultiple Airlines
Deal found 12/6$1,357

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 8, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

Gurufare
3 stars

Round-trip from

$477
(Mytrip)

One-way from

$258
(oojo)

Popular in

June

Cheapest in

November

Average price

$1,337
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 ($172 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($39 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 8, 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 1/30

11:43 am-8:10 am

2 stops13h 27m

Lisbon Humberto Delgado

Tue 2/3

5:00 am-10:06 pm

2 stops24h 06m

$498

Colorado SpringsLisbon

COS - LIS

COSLIS

Colorado Springs

Fri 1/23

11:43 am-8:10 am

2 stops13h 27m

Lisbon Humberto Delgado

Tue 1/27

5:00 am-8:05 pm

2 stops22h 05m

$498

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Mon 1/5

6:00 am-8:10 am

1 stop19h 10m

Lisbon Humberto Delgado

Wed 1/21

5:00 am-1:40 pm

1 stop15h 40m

$547

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Wed 3/4

1:25 pm-9:20 am

1 stop12h 55m

Lisbon Humberto Delgado

Wed 3/11

5:00 am-5:00 pm

1 stop18h 00m

$555

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

Sun 3/22

7:05 am-8:55 am

1 stop19h 50m

Lisbon Humberto Delgado

Wed 4/1

11:05 am-9:36 pm

1 stop17h 31m

$575

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Sun 3/8

6:25 pm-3:25 pm

2 stops39h 00m

Lisbon Humberto Delgado

Tue 3/17

4:10 pm-8:05 pm

2 stops33h 55m

$582

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Tue 1/6

5:35 pm-11:35 am

2 stops35h 00m

Lisbon Humberto Delgado

Tue 1/13

10:15 am-5:58 pm

1 stop14h 43m

$600

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Mon 3/9

12:51 pm-9:00 am

1 stop14h 09m

Lisbon Humberto Delgado

Thu 4/23

5:00 am-10:31 pm

2 stops24h 31m

$610

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Wed 3/25

10:31 am-11:20 am

2 stops18h 49m

Lisbon Humberto Delgado

Tue 3/31

5:00 am-6:00 pm

2 stops20h 00m

$614

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/7

Showing 1-10 of 59 results
1
2
3
...
6

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 $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 December 8, 2025.

It’s optimal to fly from Colorado to Portugal in the evening. By choosing this option you can save up to 26% 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 14h 09m. United Airlines provides one of the quickest options available for as low as $610. Airlines will cover a distance of 4826 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), Air France ($408), and British Airways ($424).

  • 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 $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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Colorado to Portugal

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Heathrow flights
John F Kennedy Intl to Charles de Gaulle flights
Newark to Heathrow flights
Newark to Charles de Gaulle flights
John F Kennedy Intl to Leonardo da Vinci/Fiumicino flights
John F Kennedy Intl to London City flights
Newark to Leonardo da Vinci/Fiumicino flights
LaGuardia to Heathrow flights
John F Kennedy Intl to Gatwick flights
Newark to Orly flights
John F Kennedy Intl to Orly flights
Boston to Heathrow flights
Dulles Intl to Heathrow flights
LaGuardia to Gatwick flights
Los Angeles to Heathrow flights
Newark to Gatwick flights
John F Kennedy Intl to Istanbul flights
Miami to Madrid flights
LaGuardia to Charles de Gaulle flights
John F Kennedy Intl to Lisbon flights
Newark to Lisbon flights
John F Kennedy Intl to Stansted flights
Los Angeles to Charles de Gaulle flights
John F Kennedy Intl to Malpensa flights
San Francisco to Heathrow flights
Newark to Madrid flights
O'Hare Intl to Charles de Gaulle flights
Newark to Barcelona-El Prat flights
John F Kennedy Intl to Madrid flights
Newark to Athens flights
Newark to Malpensa flights
O'Hare Intl to Heathrow flights
Boston to Charles de Gaulle flights
Baltimore to Heathrow flights
John F Kennedy Intl to Barcelona-El Prat flights
John F Kennedy Intl to Dublin flights
Dallas/Fort Worth to Heathrow flights
John F Kennedy Intl to Athens flights
Dulles Intl to Charles de Gaulle flights
Newark to Dublin flights
O'Hare Intl to Leonardo da Vinci/Fiumicino flights
Seattle to Heathrow flights
Newark to Frankfurt flights
John F Kennedy Intl to Luton flights
Dallas/Fort Worth to Leonardo da Vinci/Fiumicino flights
John F Kennedy Intl to Zurich flights
Dulles Intl to Leonardo da Vinci/Fiumicino flights
San Francisco to Charles de Gaulle flights
John F Kennedy Intl to Amsterdam flights
Boston to Leonardo da Vinci/Fiumicino flights

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 8, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$458Average$668FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$514Average$1,070FlexibilityNo cancel feeOn-time69%
Virgin AtlanticCheapest$539Average$984FlexibilityNo cancel feeOn-time72%
DeltaCheapest$551Average$939FlexibilityNo cancel feeOn-timeN/A
Turkish AirlinesCheapest$555Average$688FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$555Average$895FlexibilityNo cancel feeOn-time70%
LufthansaCheapest$565Average$1,076FlexibilityNo cancel feeOn-time76%
Air FranceCheapest$569Average$880FlexibilityNo cancel feeOn-time77%
KLMCheapest$575Average$768FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$594Average$1,338FlexibilityNo cancel feeOn-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.