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Portugal

$334+ 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 11/1. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — LIS
Jun 15 — Jun 221
Mon 6/15
Mon 6/22
1 adult, Economy
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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 May 16, 2026.

This United Airlines deal was found by Cheapflights users on 5/14. 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 12/17:45 am
DEN
-
OPO
1 stop18h 45m
United Airlines
Tue 12/156:00 am
OPO
-
DEN
1 stop17h 00m
United Airlines
Deal found 5/14$708
This United Airlines deal was found by Cheapflights users on 5/14. 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 11/31:45 pm
DEN
-
OPO
1 stop12h 45m
United Airlines
Tue 11/1712:30 pm
OPO
-
DEN
2 stops17h 33m
United Airlines
Deal found 5/14$718
This Air Canada deal was found by Cheapflights users on 5/14. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/11:25 pm
DEN
-
OPO
2 stops22h 05m
Air Canada
Tue 12/156:00 am
OPO
-
DEN
2 stops33h 50m
Air Canada
Deal found 5/14$721
This FlightHub deal was found by Cheapflights users on 5/14. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/35:45 pm
DEN
-
OPO
1 stop14h 30m
Lufthansa
Tue 11/171:45 pm
OPO
-
DEN
1 stop31h 50m
Lufthansa
Deal found 5/14$735
This United Airlines deal was found by Cheapflights users on 5/15. 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 11/2811:40 pm
DEN
-
OPO
1 stop26h 50m
United Airlines
Wed 12/212:30 pm
OPO
-
DEN
1 stop34h 30m
United Airlines
Deal found 5/15$739
This United Airlines deal was found by Cheapflights users on 5/14. 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 11/38:30 am
ASE
-
LIS
2 stops18h 20m
United Airlines
Thu 11/51:00 pm
LIS
-
ASE
2 stops38h 06m
United Airlines
Deal found 5/14$755
This United Airlines deal was found by Cheapflights users on 5/12. 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.
Mon 11/912:50 pm
COS
-
LIS
2 stops14h 25m
United Airlines
Thu 11/121:00 pm
LIS
-
COS
2 stops35h 29m
United Airlines
Deal found 5/12$756
This KAYAK deal was found by Cheapflights users on 5/15. 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.
Thu 11/1212:59 pm
DEN
-
FAO
2 stops44h 26m
Scandinavian Airlines
Tue 11/1712:00 pm
FAO
-
DEN
2 stops41h 17m
Scandinavian Airlines
Deal found 5/15$794
This United Airlines deal was found by Cheapflights users on 5/11. 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 10/126:31 pm
COS
-
LIS
2 stops31h 49m
United Airlines
Wed 10/281:00 pm
LIS
-
COS
2 stops38h 22m
United Airlines
Deal found 5/11$807
This United Airlines deal was found by Cheapflights users on 5/13. 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 11/16:35 pm
COS
-
LIS
2 stops32h 15m
United Airlines
Sun 11/151:00 pm
LIS
-
COS
2 stops41h 59m
United Airlines
Deal found 5/13$810
This Orbitz deal was found by Cheapflights users on 5/15. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/96:30 am
DEN
-
FAO
2 stops21h 40m
Scandinavian Airlines
Tue 11/1712:00 pm
FAO
-
DEN
2 stops41h 17m
Scandinavian Airlines
Deal found 5/15$810
This FlightHub deal was found by Cheapflights users on 5/15. 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.
Tue 11/104:20 pm
DEN
-
FAO
1 stop14h 00m
Lufthansa
Wed 11/182:10 pm
FAO
-
DEN
1 stop31h 25m
Lufthansa
Deal found 5/15$823

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 May 16, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$718
(United Airlines)

One-way from

$334
(KLM)

Popular in

June

Cheapest in

January

Average price

$1,086
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. 19% potential increase in price ($218 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($36 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 2026
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 May 16, 2026.
Use the filters below to find and compare flights from Colorado to Portugal that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

AspenLisbon

ASE - LIS

ASELIS

Aspen Pitkin County

Tue 11/3

8:30 am-9:50 am

2 stops18h 20m

Lisbon Humberto Delgado

Thu 11/5

1:00 pm-8:06 pm

2 stops38h 06m

$755

Colorado SpringsLisbon

COS - LIS

COSLIS

Colorado Springs

Mon 11/9

10:30 am-10:15 am

2 stops16h 45m

Lisbon Humberto Delgado

Thu 11/12

1:00 pm-5:29 pm

2 stops35h 29m

$756

Colorado SpringsLisbon

COS - LIS

COSLIS

Colorado Springs

Mon 10/12

6:31 pm-9:20 am

2 stops31h 49m

Lisbon Humberto Delgado

Wed 10/28

1:00 pm-9:22 pm

2 stops38h 22m

$807

Colorado SpringsLisbon

COS - LIS

COSLIS

Colorado Springs

Sun 11/1

6:35 pm-9:50 am

2 stops32h 15m

Lisbon Humberto Delgado

Sun 11/15

1:00 pm-11:59 pm

2 stops41h 59m

$810

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Wed 9/30

9:40 am-7:00 am

1 stop14h 20m

Porto

Tue 10/13

12:15 pm-2:32 pm

2 stops33h 17m

$818
Quickest round-trip

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Tue 9/29

11:25 am-7:00 am

1 stop12h 35m

Porto

Thu 10/8

6:00 am-3:40 pm

1 stop16h 40m

$820

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Sat 10/10

11:59 pm-9:45 am

2 stops26h 46m

Porto

Wed 10/14

12:45 pm-10:31 am

1 stop28h 46m

$830

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Wed 9/23

6:30 am-10:30 am

1 stop21h 00m

Porto

Fri 10/2

9:25 am-11:30 pm

2 stops21h 05m

$839

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Fri 11/6

5:25 pm-9:55 am

1 stop33h 30m

Lisbon Humberto Delgado

Wed 11/18

6:35 pm-3:30 pm

1 stop27h 55m

$876

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Tue 8/18

6:40 am-10:30 am

1 stop20h 50m

Porto

Mon 8/31

7:00 am-3:40 pm

1 stop15h 40m

$889

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/11

Showing 1-10 of 60 resultsSorted by cheapest first
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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

How far ahead should I book a flight from Colorado to Portugal?

To ensure you get the cheapest price possible for a flight from Colorado to Portugal, you should look to book at least 61 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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 $410). Flying from Colorado to Portugal in June is currently the most expensive (average of $833). 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 18h 20m. United Airlines provides one of the quickest options available for as low as $755. Airlines will cover a distance of 4947 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 ($309), British Airways ($326), and American Airlines ($333).

  • 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 $410). Flying from Colorado to Portugal in June is currently the most expensive (average of $833). 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 16, 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$410Average$719FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$511Average$1,098FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$559Average$984FlexibilityNo cancel feeOn-time76%
DeltaCheapest$575Average$992FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$596Average$986FlexibilityNo cancel feeOn-time67%
KLMCheapest$599Average$764FlexibilityNo cancel feeOn-time75%
Virgin AtlanticCheapest$603Average$984FlexibilityNo cancel feeOn-time72%
British AirwaysCheapest$606Average$826FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$630Average$776FlexibilityNo cancel feeOn-time71%
Turkish AirlinesCheapest$640Average$731FlexibilityNo cancel feeOn-time77%

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