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Cheap flights from Portugal to Denver from $404

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Portugal to Denver departing on 10/27. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Portugal to Denver

Recent round-trip flight deals from Portugal to Denver

Enter your travel dates to find the best prices.
Icelandair Logo
2:00 pm - 6:00 pmLIS  Lisbon Humberto Delgado-DEN Denver Intl
35h 00m1 stop Reykjavik Keflavik Intl
Icelandair Logo
3:40 pm - 12:50 pmDEN  Denver Intl-LIS Lisbon Humberto Delgado
14h 10m1 stop Reykjavik Keflavik Intl
$698Icelandair
Thu, Nov 12 - Mon, Nov 16
Icelandair Logo
2:00 pm - 6:00 pmLIS  Lisbon Humberto Delgado-DEN Denver Intl
35h 00m1 stop Reykjavik Keflavik Intl
Icelandair Logo
3:40 pm - 12:50 pmDEN  Denver Intl-LIS Lisbon Humberto Delgado
14h 10m1 stop Reykjavik Keflavik Intl
$699Icelandair
Thu, Nov 12 - Mon, Nov 16
Icelandair Logo
2:00 pm - 6:00 pmLIS  Lisbon Humberto Delgado-DEN Denver Intl
35h 00m1 stop Reykjavik Keflavik Intl
Icelandair Logo
3:40 pm - 12:50 pmDEN  Denver Intl-LIS Lisbon Humberto Delgado
14h 10m1 stop Reykjavik Keflavik Intl
$700Icelandair
Thu, Nov 12 - Mon, Nov 16
Aer Lingus Logo
10:15 pm - 6:15 pmLIS  Lisbon Humberto Delgado-DEN Denver Intl
27h 00m1 stop Dublin
Aer Lingus Logo
8:00 pm - 9:35 pmDEN  Denver Intl-LIS Lisbon Humberto Delgado
18h 35m1 stop Dublin
$869Aer Lingus
Fri, Sep 4 - Fri, Sep 18
Aer Lingus Logo
10:15 pm - 6:15 pmLIS  Lisbon Humberto Delgado-DEN Denver Intl
27h 00m1 stop Dublin
Aer Lingus Logo
8:00 pm - 9:35 pmDEN  Denver Intl-LIS Lisbon Humberto Delgado
18h 35m1 stop Dublin
$869Aer Lingus
Fri, Sep 4 - Sat, Sep 19
Aer Lingus Logo
10:15 pm - 6:15 pmLIS  Lisbon Humberto Delgado-DEN Denver Intl
27h 00m1 stop Dublin
Aer Lingus Logo
8:00 pm - 9:35 pmDEN  Denver Intl-LIS Lisbon Humberto Delgado
18h 35m1 stop Dublin
$870Aer Lingus
Fri, Sep 4 - Fri, Sep 18
Aer Lingus Logo
10:15 pm - 6:15 pmLIS  Lisbon Humberto Delgado-DEN Denver Intl
27h 00m1 stop Dublin
Aer Lingus Logo
8:00 pm - 9:35 pmDEN  Denver Intl-LIS Lisbon Humberto Delgado
18h 35m1 stop Dublin
$871Aer Lingus
Fri, Sep 4 - Fri, Sep 18
Icelandair Logo
10:20 pm - 12:40 pmLIS  Lisbon Humberto Delgado-DEN Denver Intl
21h 20m1 stop Reykjavik Keflavik Intl
Icelandair Logo
8:10 pm - 9:20 pmDEN  Denver Intl-LIS Lisbon Humberto Delgado
18h 10m1 stop Reykjavik Keflavik Intl
$903Icelandair
Thu, Aug 27 - Wed, Sep 9
United Airlines Logo
5:00 am - 3:35 pmLIS  Lisbon Humberto Delgado-DEN Denver Intl
17h 35m1 stop Frankfurt am Main
United Airlines Logo
9:35 am - 8:10 amDEN  Denver Intl-LIS Lisbon Humberto Delgado
15h 35m1 stop Newark
$1,000United Airlines
Mon, Nov 23 - Thu, Dec 3
United Airlines Logo
5:05 am - 3:40 pmLIS  Lisbon Humberto Delgado-DEN Denver Intl
17h 35m1 stop Frankfurt am Main
United Airlines Logo
7:40 am - 8:20 amDEN  Denver Intl-LIS Lisbon Humberto Delgado
17h 40m1 stop Newark
$1,000United Airlines
Fri, Sep 4 - Sat, Sep 19

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KLM flights from Portugal to Denver

Our best KLM deals on Portugal to Denver flight tickets
KLM
Oct 6
LIS9:20 amLisbon Humberto Delgado
17h 50m
2 stops
DEN8:10 pmDenver Intl
Oct 26
DEN4:18 pmDenver Intl
16h 22m
2 stops
LIS2:40 pmLisbon Humberto Delgado
$992
KLM
Oct 7
LIS5:00 amLisbon Humberto Delgado
17h 49m
2 stops
DEN3:49 pmDenver Intl
Oct 26
DEN4:18 pmDenver Intl
16h 22m
2 stops
LIS2:40 pmLisbon Humberto Delgado
$993
KLM
Sep 4
LIS5:00 amLisbon Humberto Delgado
17h 23m
2 stops
DEN3:23 pmDenver Intl
Sep 18
DEN6:35 amDenver Intl
21h 20m
2 stops
LIS10:55 amLisbon Humberto Delgado
$1,012

Aer Lingus flights from Portugal to Denver

Our best Aer Lingus deals on Portugal to Denver flight tickets
Aer Lingus
Sep 4
LIS10:15 pmLisbon Humberto Delgado
27h 00m
1 stop
DEN6:15 pmDenver Intl
Sep 19
DEN8:00 pmDenver Intl
18h 35m
1 stop
LIS9:35 pmLisbon Humberto Delgado
$869
Aer Lingus
Sep 4
LIS10:15 pmLisbon Humberto Delgado
27h 00m
1 stop
DEN6:15 pmDenver Intl
Sep 18
DEN8:00 pmDenver Intl
18h 35m
1 stop
LIS9:35 pmLisbon Humberto Delgado
$870
Aer Lingus
Sep 4
LIS10:15 pmLisbon Humberto Delgado
27h 00m
1 stop
DEN6:15 pmDenver Intl
Sep 18
DEN8:00 pmDenver Intl
18h 35m
1 stop
LIS9:35 pmLisbon Humberto Delgado
$871

momondo Fare Finder

 
Customize your flight search to find flights from Portugal to Denver 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, momondo users made 832,500 searches. Data last updated August 13, 2026.
Use the filters below to find and compare flights from Portugal to Denver that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LisbonDenver

LIS Lisbon Humberto Delgado - DEN Denver Intl

LISDEN

Lisbon Humberto Delgado

Thu 11/12

2:00 pm-6:00 pm

1 stop35h 00m

Denver Intl

Mon 11/16

3:40 pm-12:50 pm

1 stop14h 10m

$698

LisbonDenver

LIS Lisbon Humberto Delgado - DEN Denver Intl

LISDEN

Lisbon Humberto Delgado

Thu 11/12

2:00 pm-6:00 pm

1 stop35h 00m

Denver Intl

Mon 11/16

3:40 pm-12:50 pm

1 stop14h 10m

$699

LisbonDenver

LIS Lisbon Humberto Delgado - DEN Denver Intl

LISDEN

Lisbon Humberto Delgado

Thu 11/12

2:00 pm-6:00 pm

1 stop35h 00m

Denver Intl

Mon 11/16

3:40 pm-12:50 pm

1 stop14h 10m

$700

LisbonDenver

LIS Lisbon Humberto Delgado - DEN Denver Intl

LISDEN

Lisbon Humberto Delgado

Fri 9/4

10:15 pm-6:15 pm

1 stop27h 00m

Denver Intl

Fri 9/18

8:00 pm-9:35 pm

1 stop18h 35m

$869

LisbonDenver

LIS Lisbon Humberto Delgado - DEN Denver Intl

LISDEN

Lisbon Humberto Delgado

Fri 9/4

10:15 pm-6:15 pm

1 stop27h 00m

Denver Intl

Sat 9/19

8:00 pm-9:35 pm

1 stop18h 35m

$869

LisbonDenver

LIS Lisbon Humberto Delgado - DEN Denver Intl

LISDEN

Lisbon Humberto Delgado

Fri 9/4

10:15 pm-6:15 pm

1 stop27h 00m

Denver Intl

Fri 9/18

8:00 pm-9:35 pm

1 stop18h 35m

$870

LisbonDenver

LIS Lisbon Humberto Delgado - DEN Denver Intl

LISDEN

Lisbon Humberto Delgado

Fri 9/4

10:15 pm-6:15 pm

1 stop27h 00m

Denver Intl

Fri 9/18

8:00 pm-9:35 pm

1 stop18h 35m

$871

LisbonDenver

LIS Lisbon Humberto Delgado - DEN Denver Intl

LISDEN

Lisbon Humberto Delgado

Thu 8/27

10:20 pm-12:40 pm

1 stop21h 20m

Denver Intl

Wed 9/9

8:10 pm-9:20 pm

1 stop18h 10m

$903
Quickest round-trip

LisbonDenver

LIS Lisbon Humberto Delgado - DEN Denver Intl

LISDEN

Lisbon Humberto Delgado

Mon 11/23

5:00 am-3:35 pm

1 stop17h 35m

Denver Intl

Thu 12/3

9:35 am-8:10 am

1 stop15h 35m

$1,000

LisbonDenver

LIS Lisbon Humberto Delgado - DEN Denver Intl

LISDEN

Lisbon Humberto Delgado

Fri 9/4

5:05 am-3:40 pm

1 stop17h 35m

Denver Intl

Sat 9/19

7:40 am-8:20 am

1 stop17h 40m

$1,000

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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How to get the cheapest flight ticket from Portugal to Denver

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Denver?

The cheapest month to fly to Denver from Portugal is in February. Flight prices, which tend to average around $888, are often lower during this time because this is during the off-season. If you don’t want to visit Denver in February, then you should wait until January to fly from Portugal, when ticket prices are also cheap, with an average price of $933.

Can stopping save me money on Portugal to Denver flights?

You could potentially save up to 11% on your flight if you consider stops on a Portugal to Denver flight.

Cheap Portugal to Denver flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Portugal to Denver

Fastest flight time

15h 15m

Direct flights

None
The fastest flight from Portugal to Denver takes 15h 15m
There are no direct flights from Portugal to Denver. There are no popular flight routes from Portugal to Denver.
Search flight deals

Frequently asked questions about flying from Portugal to Denver

  • When did momondo last update prices for flights from Portugal to Denver Intl Airport?

    Prices for flights from Portugal to Denver Intl Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Portugal to Denver Intl Airport?

  • How old do you have to be to fly from Portugal to Denver Intl Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Portugal to Denver Intl Airport.

  • What documentation or ID do you need to fly to Denver Intl Airport?

    The required travel and health documents for your Denver Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Denver Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from Portugal to Denver

Compare and see reviews for airlines that fly from Portugal to Denver with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $920Free CancellationRating
7.4
10,114 reviews
Search United Airlines flights

Traveling to a place near Denver?

Book flights to Denver if you plan to visit one of these locations
Breckenridge
Estes Park
Black Hawk
Aurora
Fort Collins
Boulder
Westminster
Longmont
Manitou Springs
Lakewood
Greeley
Keystone
Thornton
Cripple Creek
Centennial
Littleton
Englewood
Frisco
Winter Park
Golden

Why use momondo?

Why should I use momondo to find a flight deal from Portugal to Denver?

It is quick and easy to find Portugal to Denver flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Denver that suits you.

Can I find flights from Portugal to Denver with flexible booking policies on momondo?

momondo does allow users to show only those flights to Denver from Portugal which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Portugal to Denver?

momondo helps you find the best flight between Portugal and Denver by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Portugal to Denver right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Portugal to Denver now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Denver and let you know when they change.

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