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 61% of people opting to fly with this airline when traveling to Portugal. Keep in mind that there are 14 different airlines that fly to Portugal on a routine basis, so you have a few additional options to choose from.

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 14 operators available for flights from Denver Intl Airport to Portugal as of October 2025.

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.

$276 Cheap Flights from Denver to Portugal in 2025/26

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One-way

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Cheap round-trip flights

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4:20 pm - 12:50 pmDEN-OPO

13h 30m1 stop

1:45 pm - 2:35 pmOPO-DEN

31h 50m1 stop

$543Lufthansa

Find Deal

Mon, Dec 1 - Mon, Dec 8

4:20 pm - 12:50 pmDEN-OPO

13h 30m1 stop

7:20 pm - 8:04 pmOPO-DEN

31h 44m2 stops

$548Multiple Airlines

Find Deal

Mon, Dec 1 - Mon, Dec 8

11:15 am - 10:20 amDEN-LIS

40h 05m2 stops

11:20 am - 10:23 amLIS-DEN

30h 03m2 stops

$573Air Canada

Find Deal

Sat, Oct 25 - Tue, Nov 18

6:00 am - 9:30 amDEN-OPO

20h 30m2 stops

6:00 am - 9:22 pmOPO-DEN

22h 22m2 stops

$576United Airlines

Find Deal

Sun, Nov 23 - Tue, Dec 9

11:59 pm - 9:30 amDEN-OPO

26h 31m2 stops

6:00 am - 6:06 pmOPO-DEN

19h 06m2 stops

$577United Airlines

Find Deal

Sun, Nov 23 - Tue, Dec 9

5:30 pm - 9:20 amDEN-LIS

32h 50m1 stop

10:50 am - 7:55 pmLIS-DEN

40h 05m2 stops

$588Air Canada

Find Deal

Sat, Nov 29 - Sun, Dec 14

5:25 pm - 11:35 amDEN-FNC

35h 10m1 stop

5:00 pm - 3:30 pmFNC-DEN

29h 30m1 stop

$656British Airways

Find Deal

Thu, Nov 6 - Thu, Nov 20

7:20 pm - 9:55 amDEN-OPO

31h 35m1 stop

10:55 am - 5:35 pmOPO-DEN

37h 40m1 stop

$656Turkish Airlines

Find Deal

Tue, Nov 11 - Mon, Nov 17

5:25 pm - 9:50 amDEN-LIS

33h 25m1 stop

3:55 pm - 3:30 pmLIS-DEN

30h 35m1 stop

$661British Airways

Find Deal

Sun, Nov 16 - Sat, Nov 22

7:20 pm - 9:55 amDEN-OPO

31h 35m1 stop

4:10 pm - 5:35 pmOPO-DEN

32h 25m1 stop

$700Turkish Airlines

Find Deal

Thu, Nov 13 - Mon, Nov 17

Lufthansa flights from Denver to Portugal

Our best Lufthansa deals on Denver to Portugal flight tickets

Lufthansa

Dec 1

DEN4:20 pmDenver Intl

13h 30m

1 stop

OPO12:50 pmPorto

Dec 8

OPO1:45 pmPorto

31h 50m

1 stop

DEN2:35 pmDenver Intl

$543

Find similar

Lufthansa

Nov 19

DEN5:25 pmDenver Intl

22h 25m

2 stops

LIS10:50 pmLisbon Humberto Delgado

Nov 26

LIS5:00 amLisbon Humberto Delgado

25h 15m

2 stops

DEN11:15 pmDenver Intl

$580

Find similar

Lufthansa

Nov 16

DEN5:45 pmDenver Intl

14h 20m

1 stop

LIS3:05 pmLisbon Humberto Delgado

Nov 23

LIS5:00 amLisbon Humberto Delgado

18h 00m

1 stop

DEN4:00 pmDenver Intl

$582

Find similar

British Airways flights from Denver to Portugal

Our best British Airways deals on Denver to Portugal flight tickets

British Airways

Nov 6

DEN5:25 pmDenver Intl

35h 10m

1 stop

FNC11:35 amFunchal Madeira

Nov 20

FNC5:00 pmFunchal Madeira

29h 30m

1 stop

DEN3:30 pmDenver Intl

$656

Find similar

British Airways

Nov 16

DEN5:25 pmDenver Intl

33h 25m

1 stop

LIS9:50 amLisbon Humberto Delgado

Nov 22

LIS3:55 pmLisbon Humberto Delgado

30h 35m

1 stop

DEN3:30 pmDenver Intl

$661

Find similar

British Airways

Nov 6

DEN5:25 pmDenver Intl

35h 10m

1 stop

FNC11:35 amFunchal Madeira

Nov 20

FNC5:00 pmFunchal Madeira

37h 31m

2 stops

DEN11:31 pmDenver Intl

$684

Find similar

Fly from

Fly to

Route

Depart

Return

Price

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Mon 12/1

4:20 pm-12:50 pm

1 stop13h 30m

Porto

Mon 12/8

1:45 pm-2:35 pm

1 stop31h 50m

$543

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Mon 12/1

4:20 pm-12:50 pm

1 stop13h 30m

Porto

Mon 12/8

7:20 pm-8:04 pm

2 stops31h 44m

$548

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Sat 10/25

11:15 am-10:20 am

2 stops40h 05m

Lisbon Humberto Delgado

Tue 11/18

11:20 am-10:23 am

2 stops30h 03m

$573

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Sun 11/23

6:00 am-9:30 am

2 stops20h 30m

Porto

Tue 12/9

6:00 am-9:22 pm

2 stops22h 22m

$576

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Sun 11/23

11:59 pm-9:30 am

2 stops26h 31m

Porto

Tue 12/9

6:00 am-6:06 pm

2 stops19h 06m

$577

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Sat 11/29

5:30 pm-9:20 am

1 stop32h 50m

Lisbon Humberto Delgado

Sun 12/14

10:50 am-7:55 pm

2 stops40h 05m

$588

DenverFunchal

DEN - FNC

DENFNC

Denver Intl

Thu 11/6

5:25 pm-11:35 am

1 stop35h 10m

Funchal Madeira

Thu 11/20

5:00 pm-3:30 pm

1 stop29h 30m

$656

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Tue 11/11

7:20 pm-9:55 am

1 stop31h 35m

Porto

Mon 11/17

10:55 am-5:35 pm

1 stop37h 40m

$656

DenverLisbon

DEN - LIS

DENLIS

Denver Intl

Sun 11/16

5:25 pm-9:50 am

1 stop33h 25m

Lisbon Humberto Delgado

Sat 11/22

3:55 pm-3:30 pm

1 stop30h 35m

$661

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Thu 11/13

7:20 pm-9:55 am

1 stop31h 35m

Porto

Mon 11/17

4:10 pm-5:35 pm

1 stop32h 25m

$700

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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 $740, 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 $774.

What is the cheapest day to depart on your flight to Portugal?

According to our data, Wednesday is the cheapest day to fly to Portugal from Denver. The lowest ticket price found for a Wednesday departure recently was $950. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. The most expensive day to fly to Portugal is Saturday, with ticket prices averaging around $1,154.

What is the cheapest time of day to depart on your flight to Portugal?

Our most recent data shows that the best time of day to fly to Portugal is in the morning. Flights from Denver to Portugal during this time can be as low as $995. At noon is when there is more demand to fly to Portugal, so prices are often more expensive at around $1,110 per ticket.

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 $956 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 $825 on momondo.

Can stopping save me money on Denver to Portugal flights?

You could potentially save up to 3% 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

Direct flights	None

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 14 operators available for flights from Denver Intl Airport to Portugal as of October 2025.
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 7.0 556 reviews	Search Icelandair flights
Virgin Atlantic	PriceFrom $539	Free Cancellation	Rating 7.5 670 reviews	Search Virgin Atlantic flights
Turkish Airlines	PriceFrom $555	Free Cancellation	Rating 7.3 4,015 reviews	Search Turkish Airlines flights
Air France	PriceFrom $569	Free Cancellation	Rating 7.4 1,475 reviews	Search Air France flights
Delta	PriceFrom $575	Free Cancellation	Rating 7.9 7,971 reviews	Search Delta flights
British Airways	PriceFrom $577	Free Cancellation	Rating 6.7 7,459 reviews	Search British Airways flights
Lufthansa	PriceFrom $583	Free Cancellation	Rating 6.8 7,502 reviews	Search Lufthansa flights
American Airlines	PriceFrom $594	Free Cancellation	Rating 7.2 11,035 reviews	Search American Airlines flights
Air Canada	PriceFrom $596	Free Cancellation	Rating 7.1 10,320 reviews	Search Air Canada flights
KLM	PriceFrom $599	Free Cancellation	Rating 7.7 1,404 reviews	Search KLM 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.

Start using Trips

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Mon 11/17

Mon 11/24

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Find better results for your trip to Portugal

Popular cities in Portugal

Flights to Lisbonfrom $351

Flights to Portofrom $343

Flights to Funchalfrom $415

Flights to Farofrom $419

Flights to Ponta Delgadafrom $430

Flights to Lajesfrom $477

Flights to Hortafrom $592

Flights to Pico Islandfrom $556

Flights to Porto Santofrom $425

Flights to Velasfrom $584

Cheap flights from Denver to Portugal from $276

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 11/17. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from Denver to Portugal

Cheap round-trip flights

Cheap one-way flights

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Lufthansa flights from Denver to Portugal

Our best Lufthansa deals on Denver to Portugal flight tickets

British Airways flights from Denver to Portugal

Our best British Airways 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.

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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

What is the cheapest month to fly to Portugal?

What is the cheapest day to depart on your flight to Portugal?

What is the cheapest time of day to depart on your flight to Portugal?

Our most recent data shows that the best time of day to fly to Portugal is in the morning. Flights from Denver to Portugal during this time can be as low as $995. At noon is when there is more demand to fly to Portugal, so prices are often more expensive at around $1,110 per ticket.

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

Can stopping save me money on Denver to Portugal flights?

You could potentially save up to 3% on your flight if you consider stops on a Denver to Portugal flight.

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

Direct flights

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

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

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

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

Best airlines flying from Denver to Portugal

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

Why use momondo?

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

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

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

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

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