What airlines fly to Portugal?

United Airlines, Lufthansa and British Airways are the top three most popular airlines that fly to Portugal from Denver according to our data. United Airlines is the first choice among our users, with 62% of people opting to fly with this airline when traveling to Portugal. Keep in mind that there are 13 different airlines that fly to Portugal on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from Denver Intl to Portugal?

United Airlines, KLM, and Delta are the most popular carriers operating from Denver Intl to Portugal

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

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

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

There are 13 operators available for flights from Denver Intl Airport to Portugal as of March 2026.

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

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 Denver Intl Airport to Portugal.

What documentation or ID do you need to fly to Portugal?

The required travel and health documents for your Portugal 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 Portugal. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$294 Cheap Flights from Denver to Portugal in 2026

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Find the cheapest flights from Denver to Portugal

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

4:05 pm - 1:40 pm

DEN

LIS

14h 35m

1 stop

6:45 am - 7:29 pm

LIS

DEN

19h 44m

2 stops

$619Lufthansa

Tue, Apr 7 - Tue, Apr 28

4:05 pm - 1:40 pm

DEN

LIS

14h 35m

1 stop

6:45 am - 3:40 pm

LIS

DEN

15h 55m

1 stop

$629Lufthansa

Tue, Apr 7 - Tue, Apr 21

4:05 pm - 1:40 pm

DEN

LIS

14h 35m

1 stop

6:15 am - 2:20 pm

LIS

DEN

15h 05m

1 stop

$630Lufthansa

Tue, Apr 7 - Tue, Apr 28

8:25 pm - 3:35 pm

DEN

LIS

36h 10m

1 stop

10:55 am - 6:25 pm

LIS

DEN

38h 30m

1 stop

$653Turkish Airlines

Sun, Apr 26 - Mon, May 11

8:25 pm - 3:35 pm

DEN

LIS

36h 10m

1 stop

4:45 pm - 6:25 pm

LIS

DEN

32h 40m

1 stop

$654Turkish Airlines

Tue, Apr 28 - Fri, May 8

11:45 am - 3:30 pm

DEN

OPO

20h 45m

2 stops

5:00 am - 10:39 pm

OPO

DEN

24h 39m

2 stops

$687Delta

Wed, Apr 29 - Thu, May 7

3:55 pm - 11:20 am

DEN

FAO

36h 25m

2 stops

3:25 pm - 4:29 pm

FAO

DEN

32h 04m

2 stops

$695United Airlines

Mon, Apr 13 - Mon, Apr 20

9:40 am - 7:00 am

DEN

OPO

14h 20m

1 stop

12:15 pm - 2:16 pm

OPO

DEN

33h 01m

2 stops

$717United Airlines

Wed, Aug 12 - Tue, Aug 25

6:30 pm - 6:55 pm

DEN

OPO

17h 25m

1 stop

8:55 pm - 4:30 pm

OPO

DEN

26h 35m

1 stop

$719British Airways

Wed, Apr 22 - Tue, May 5

6:30 pm - 6:35 pm

DEN

FNC

17h 05m

1 stop

6:55 pm - 4:20 pm

FNC

DEN

28h 25m

1 stop

$814British Airways

Mon, Apr 13 - Mon, Apr 20

Turkish Airlines flights from Denver to Portugal

Our best Turkish Airlines deals on Denver to Portugal flight tickets

Turkish Airlines

Apr 26

DEN8:25 pmDenver Intl

36h 10m

1 stop

LIS3:35 pmLisbon Humberto Delgado

May 11

LIS10:55 amLisbon Humberto Delgado

38h 30m

1 stop

DEN6:25 pmDenver Intl

$653

Turkish Airlines

Apr 28

DEN8:25 pmDenver Intl

36h 10m

1 stop

LIS3:35 pmLisbon Humberto Delgado

May 8

LIS4:45 pmLisbon Humberto Delgado

32h 40m

1 stop

DEN6:25 pmDenver Intl

$654

Turkish Airlines

Mar 28

DEN8:25 pmDenver Intl

30h 25m

1 stop

LIS9:50 amLisbon Humberto Delgado

Apr 11

LIS10:55 amLisbon Humberto Delgado

38h 30m

1 stop

DEN6:25 pmDenver Intl

$655

Lufthansa flights from Denver to Portugal

Our best Lufthansa deals on Denver to Portugal flight tickets

Lufthansa

Apr 7

DEN4:05 pmDenver Intl

14h 35m

1 stop

LIS1:40 pmLisbon Humberto Delgado

Apr 28

LIS6:45 amLisbon Humberto Delgado

19h 44m

2 stops

DEN7:29 pmDenver Intl

$619

Lufthansa

Apr 7

DEN4:05 pmDenver Intl

14h 35m

1 stop

LIS1:40 pmLisbon Humberto Delgado

Apr 21

LIS6:45 amLisbon Humberto Delgado

15h 55m

1 stop

DEN3:40 pmDenver Intl

$629

Lufthansa

Apr 7

DEN4:05 pmDenver Intl

14h 35m

1 stop

LIS1:40 pmLisbon Humberto Delgado

Apr 28

LIS6:15 amLisbon Humberto Delgado

15h 05m

1 stop

DEN2:20 pmDenver Intl

$630

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Tue 4/7

4:05 pm-1:40 pm

1 stop14h 35m

Lisbon Humberto Delgado

Tue 4/28

6:45 am-7:29 pm

2 stops19h 44m

$619

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Tue 4/7

4:05 pm-1:40 pm

1 stop14h 35m

Lisbon Humberto Delgado

Tue 4/21

6:45 am-3:40 pm

1 stop15h 55m

$629

Quickest round-trip

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Tue 4/7

4:05 pm-1:40 pm

1 stop14h 35m

Lisbon Humberto Delgado

Tue 4/28

6:15 am-2:20 pm

1 stop15h 05m

$630

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Sun 4/26

8:25 pm-3:35 pm

1 stop36h 10m

Lisbon Humberto Delgado

Mon 5/11

10:55 am-6:25 pm

1 stop38h 30m

$653

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Tue 4/28

8:25 pm-3:35 pm

1 stop36h 10m

Lisbon Humberto Delgado

Fri 5/8

4:45 pm-6:25 pm

1 stop32h 40m

$654

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Wed 4/29

11:45 am-3:30 pm

2 stops20h 45m

Porto

Thu 5/7

5:00 am-10:39 pm

2 stops24h 39m

$687

DenverFaro

DEN - FAO

DENFAO

Denver Intl

Mon 4/13

3:55 pm-11:20 am

2 stops36h 25m

Faro

Mon 4/20

3:25 pm-4:29 pm

2 stops32h 04m

$695

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Wed 8/12

9:40 am-7:00 am

1 stop14h 20m

Porto

Tue 8/25

12:15 pm-2:16 pm

2 stops33h 01m

$717

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Wed 4/22

6:30 pm-6:55 pm

1 stop17h 25m

Porto

Tue 5/5

8:55 pm-4:30 pm

1 stop26h 35m

$719

DenverFunchal

DEN - FNC

DENFNC

Denver Intl

Mon 4/13

6:30 pm-6:35 pm

1 stop17h 05m

Funchal Madeira

Mon 4/20

6:55 pm-4:20 pm

1 stop28h 25m

$814

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Denver to Portugal

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

Prices

Airlines

What is the cheapest month to fly to Portugal?

The cheapest month to fly to Portugal from Denver is in January. Flight prices, which tend to average around $626, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of January, then book flights to Portugal from Denver during February instead. Flights to Portugal in February, while not as cheap as those in January, still average around $630.

How far in advance should I book a flight to Portugal?

You are more likely to see cheaper flights to Portugal from Denver when booking weeks ahead of your departure date. In general, you can expect to find flights to Portugal for around $887 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Portugal from Denver for as low as $722 on momondo.

Can stopping save me money on Denver to Portugal flights?

You could potentially save up to 16% on your flight if you consider stops on a Denver to Portugal flight.

Cheap Denver to Portugal flight deals and tips

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

Fastest flight time	12h 28m
Direct flights	None

The fastest flight from Denver to Portugal takes 12h 28m

There are no direct flights from Denver to Portugal. There are no popular flight routes from Denver to Portugal.

Search flight deals

When did momondo last update prices for flights from Denver Intl Airport to Portugal?
Prices for flights from Denver Intl Airport to Portugal are refreshed on a daily basis.
How many operators does momondo search for flights from Denver Intl Airport to Portugal?
There are 13 operators available for flights from Denver Intl Airport to Portugal as of March 2026.
How old do you have to be to fly from Denver Intl Airport to Portugal?
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 Denver Intl Airport to Portugal.
What documentation or ID do you need to fly to Portugal?
The required travel and health documents for your Portugal 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 Portugal. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from Denver to Portugal

Compare and see reviews for airlines that fly from Denver to Portugal with momondo

Airline	Rating	Free Cancellation	Price
Icelandair	PriceFrom $458	Free Cancellation	Rating 7.1 622 reviews	Search Icelandair flights
British Airways	PriceFrom $555	Free Cancellation	Rating 6.7 7,797 reviews	Search British Airways flights
Lufthansa	PriceFrom $559	Free Cancellation	Rating 6.8 7,858 reviews	Search Lufthansa flights
United Airlines	PriceFrom $574	Free Cancellation	Rating 7.4 9,431 reviews	Search United Airlines flights
Delta	PriceFrom $575	Free Cancellation	Rating 7.9 8,288 reviews	Search Delta flights
Air Canada	PriceFrom $595	Free Cancellation	Rating 7.1 10,811 reviews	Search Air Canada flights
KLM	PriceFrom $599	Free Cancellation	Rating 7.8 1,472 reviews	Search KLM flights
Virgin Atlantic	PriceFrom $603	Free Cancellation	Rating 7.5 682 reviews	Search Virgin Atlantic flights
American Airlines	PriceFrom $630	Free Cancellation	Rating 7.1 11,466 reviews	Search American Airlines flights
Turkish Airlines	PriceFrom $634	Free Cancellation	Rating 7.3 4,258 reviews	Search Turkish Airlines flights

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Denver to Portugal. momondo saves you time and could save you money on your trip.

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

Flights from Denver to Portugal with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once you have performed a search for Denver to Portugal flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Yes momondo offers price alerts on flights to Portugal from Denver. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Portugal trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

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Popular cities

Other flights from Denver

Other flights to Portugal

Airlines

Cabin classes

Complete your trip

Feeling lucky

Popular cities in Portugal

Flights to Lisbonfrom $435

Flights to Portofrom $442

Flights to Funchalfrom $492

Flights to Farofrom $387

Flights to Ponta Delgadafrom $493

Flights to Lajesfrom $569

Flights to Pico Islandfrom $588

Flights to Hortafrom $638

Flights to Porto Santofrom $675

Flights to Velasfrom $583

Cheap flights from Denver to Portugal from $294

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Denver to Portugal departing on 5/13. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Turkish Airlines flights from Denver to Portugal

Our best Turkish Airlines deals on Denver to Portugal flight tickets

Lufthansa flights from Denver to Portugal

Our best Lufthansa deals on Denver to Portugal flight tickets

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Use the filters below to find and compare flights from Denver to Portugal that are best for you.

See travel insights to Portugal from

How to get the cheapest flight ticket from Denver to Portugal

What is the cheapest month to fly to Portugal?

How far in advance should I book a flight to Portugal?

Can stopping save me money on Denver to Portugal flights?

What is the cheapest airline that flies from Denver Intl to Portugal?

What airlines fly to Portugal?

Cheap Denver to Portugal flight deals and tips

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

Fastest flight time

Direct flights

Best airlines flying from Denver to Portugal

Compare and see reviews for airlines that fly from Denver to Portugal with momondo

Why use momondo?

An easier way to manage your Portugal trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Portugal

Popular cities in Portugal

Popular flights according to clicks in the last 7 days on momondo

Denver flight routes

According to popular flight searches on momondo this year

Portugal flight routes

According to popular flight searches on momondo this year

Fly your favorite airline to Portugal

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to Portugal

List of cabin classes available on flights landing in Portugal. Availability may vary depending on flight origin and airline.

Complete your trip to Portugal

Explore popular destinations other users love

According to popular flight searches on momondo this year