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Portugal

$273+ 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 10/14. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — LIS
Aug 13 — Aug 201
Thu 8/13
Thu 8/20
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 July 14, 2026.

This Mytrip deal was found by Cheapflights users on 7/13. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/304:40 pm
DEN
-
LIS
1 stop14h 10m
Icelandair
Tue 10/63:00 pm
LIS
-
DEN
1 stop35h 00m
Icelandair
Deal found 7/13$591
This FlightHub deal was found by Cheapflights users on 7/10. 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.
Wed 10/284:40 pm
DEN
-
LIS
1 stop14h 10m
Icelandair
Tue 11/32:00 pm
LIS
-
DEN
1 stop35h 00m
Icelandair
Deal found 7/10$600
This Icelandair deal was found by Cheapflights users on 7/11. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/163:40 pm
DEN
-
LIS
1 stop14h 10m
Icelandair
Thu 11/262:00 pm
LIS
-
DEN
1 stop35h 00m
Icelandair
Deal found 7/11$622
This Icelandair deal was found by Cheapflights users on 7/14. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/214:40 pm
DEN
-
LIS
1 stop14h 10m
Icelandair
Thu 10/292:00 pm
LIS
-
DEN
1 stop35h 00m
Icelandair
Deal found 7/14$629
This Kiwi.com deal was found by Cheapflights users on 7/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/284:40 pm
DEN
-
LIS
1 stop14h 10m
Icelandair
Thu 11/52:00 pm
LIS
-
DEN
1 stop35h 00m
Icelandair
Deal found 7/10$669
This oojo deal was found by Cheapflights users on 7/13. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/14:15 pm
DEN
-
OPO
1 stop13h 35m
Lufthansa
Thu 12/106:00 am
OPO
-
DEN
1 stop16h 35m
Lufthansa
Deal found 7/13$700
This Booking.com deal was found by Cheapflights users on 7/11. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/164:15 pm
DEN
-
OPO
1 stop13h 35m
Lufthansa
Wed 11/256:00 am
OPO
-
DEN
1 stop16h 35m
Lufthansa
Deal found 7/11$704
This United Airlines deal was found by Cheapflights users on 7/12. 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.
Sun 11/812:30 pm
DEN
-
OPO
1 stop14h 00m
United Airlines
Thu 11/126:00 am
OPO
-
DEN
1 stop16h 35m
United Airlines
Deal found 7/12$707
This Booking.com deal was found by Cheapflights users on 7/11. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/164:15 pm
DEN
-
OPO
1 stop13h 35m
Multiple Airlines
Wed 11/256:00 am
OPO
-
DEN
2 stops19h 13m
Multiple Airlines
Deal found 7/11$709
This Gotogate deal was found by Cheapflights users on 7/12. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/35:40 pm
DEN
-
LIS
1 stop32h 15m
Multiple Airlines
Wed 11/185:00 am
LIS
-
DEN
1 stop17h 35m
Multiple Airlines
Deal found 7/12$710
This oojo deal was found by Cheapflights users on 7/14. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/275:15 pm
DEN
-
LIS
1 stop14h 05m
Lufthansa
Fri 11/65:00 am
LIS
-
DEN
1 stop17h 35m
Lufthansa
Deal found 7/14$711
This Booking.com deal was found by Cheapflights users on 7/11. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1611:20 am
DEN
-
OPO
2 stops18h 30m
Air Canada
Wed 11/256:00 am
OPO
-
DEN
2 stops19h 13m
Air Canada
Deal found 7/11$713

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 July 14, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$591
(Mytrip)

One-way from

$273
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$1,147
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. 21% potential increase in price ($258 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($37 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 July 14, 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
Quickest round-trip

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Sun 11/8

12:30 pm-9:30 am

1 stop14h 00m

Porto

Thu 11/12

6:00 am-3:35 pm

1 stop16h 35m

$707

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Tue 10/6

9:40 am-9:20 am

1 stop16h 40m

Lisbon Humberto Delgado

Tue 10/20

5:05 am-1:35 pm

1 stop15h 30m

$783

DenverFunchal

DEN - FNC

DENFNC

Denver Intl

Wed 11/11

11:59 pm-5:10 pm

2 stops34h 11m

Funchal Madeira

Wed 11/18

10:25 am-3:56 pm

2 stops36h 31m

$794

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Fri 10/30

11:02 am-10:35 am

2 stops17h 33m

Porto

Sun 11/8

5:00 am-7:31 pm

2 stops21h 31m

$822

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Sun 11/15

5:01 pm-9:45 pm

1 stop21h 44m

Lisbon Humberto Delgado

Thu 11/19

12:55 pm-3:10 pm

1 stop33h 15m

$824

DenverPonta Delgada

DEN - PDL

DENPDL

Denver Intl

Mon 8/17

12:40 pm-8:40 am

1 stop14h 00m

Ponta Delgada Nordela

Wed 9/2

9:35 am-10:35 am

1 stop31h 00m

$834

DenverPonta Delgada

DEN - PDL

DENPDL

Denver Intl

Mon 8/17

6:05 pm-8:20 am

1 stop32h 15m

Ponta Delgada Nordela

Wed 9/2

9:35 am-8:34 am

2 stops28h 59m

$838

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

$862

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Wed 9/30

11:25 am-7:00 am

1 stop12h 35m

Porto

Tue 10/13

12:15 pm-4:22 pm

3 stops35h 07m

$863

DenverFunchal

DEN - FNC

DENFNC

Denver Intl

Thu 9/24

12:15 pm-6:35 pm

2 stops23h 20m

Funchal Madeira

Thu 10/1

10:05 am-5:40 pm

2 stops38h 35m

$864

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/10

Showing 1-10 of 52 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

What is the cheapest month to book a flight from Colorado to Portugal?

Currently, March is the cheapest month in which you can book a flight from Colorado to Portugal (average of $450). Flying from Colorado to Portugal in June is currently the most expensive (average of $1,029). 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.

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.

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. United Airlines provides one of the quickest options available for as low as $707. Airlines will cover a distance of 4747 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 ($246), 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, March is the cheapest month in which you can book a flight from Colorado to Portugal (average of $450). Flying from Colorado to Portugal in June is currently the most expensive (average of $1,029). 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

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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 July 14, 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$464Average$563FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$514Average$1,147FlexibilityNo cancel feeOn-time69%
KLMCheapest$551Average$719FlexibilityNo cancel feeOn-time75%
LufthansaCheapest$559Average$999FlexibilityNo cancel feeOn-time76%
DeltaCheapest$575Average$941FlexibilityNo cancel feeOn-timeN/A
Virgin AtlanticCheapest$592Average$712FlexibilityNo cancel feeOn-time72%
British AirwaysCheapest$622Average$890FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$630Average$776FlexibilityNo cancel feeOn-time71%
Turkish AirlinesCheapest$635Average$743FlexibilityNo cancel feeOn-time77%
Air CanadaCheapest$645Average$985FlexibilityNo cancel feeOn-time67%

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