Portugal

$271+ Cheap flights from Denver (DEN) to Portugal

DEN — LIS
Dec 4 — Dec 111
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1. Tell us where you want to go

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Cheap flight deals from Denver to Portugal

Cheapest flights from Denver to Portugal

Mon 11/94:15 pm -
1 stop14h 15m
Tue 11/175:00 am -
1 stop17h 35m
Deal found 11/2$408
Sat 12/51:30 pm -
2 stops18h 35m
Sat 12/128:30 pm -
2 stops27h 20m
Deal found 10/31$531
Sun 11/291:30 pm -
2 stops15h 35m
Sun 12/610:05 pm -
2 stops25h 45m
Deal found 10/31$534
Sun 11/151:30 pm -
2 stops25h 05m
Tue 11/248:15 pm -
2 stops26h 20m
Deal found 10/30$555
Wed 11/251:30 pm -
2 stops15h 30m
Mon 11/3010:00 pm -
2 stops24h 35m
Deal found 10/30$590
Mon 11/93:40 pm -
1 stop14h 05m
Sun 11/222:10 pm -
1 stop34h 50m
Deal found 11/1$611
Wed 11/113:40 pm -
1 stop14h 10m
Tue 11/171:55 pm -
1 stop35h 05m
Deal found 10/30$614
Mon 11/93:40 pm -
1 stop14h 05m
Tue 11/171:55 pm -
1 stop35h 05m
Deal found 10/31$616
Thu 11/123:40 pm -
2 stops21h 45m
Thu 11/195:55 am -
2 stops19h 05m
Deal found 10/30$626
Mon 12/73:40 pm -
1 stop14h 05m
Tue 1/1211:35 am -
1 stop13h 25m
Deal found 11/1$648
Mon 11/234:15 pm -
1 stop13h 35m
Thu 12/36:00 am -
1 stop16h 35m
Deal found 11/2$791
Mon 11/234:15 pm -
1 stop13h 35m
Thu 12/36:00 am -
2 stops19h 13m
Deal found 11/2$792

Find flight deals from Denver to Portugal

Most accurate provider

Ovago
3 stars

Most trusted provider

Ovago
3 stars

Round-trip from

$531
(Mytrip)

One-way from

$271
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$801
Provider with most accurate pricing for Denver Intl-Lisbon Humberto Delgado flight deals.
Provider most trusted by Cheapflights users for Denver Intl-Lisbon Humberto Delgado flights.
From Denver Intl to Portugal
One-way flight from Denver Intl to Portugal
Highest demand for flights based on searches. 21% potential increase in price ($257 potential increase over avg. RT price).
Cheapest flight prices on average. 3% potential price decrease ($37 potential savings vs. average RT price).
Average for round-trip flights in November 2026

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

DenverFaro

DEN Denver Intl - FAO Faro

DENFAO

Denver Intl

Wed 1/13

3:40 pm-8:40 pm

3 stops22h 00m

Faro

Wed 12/31

12:00 am-4:00 pm

Nonstop0h 00m

$323

DenverPorto

DEN Denver Intl - OPO Porto

DENOPO

Denver Intl

Sun 4/25

4:00 pm-11:25 pm

1 stop24h 25m

Porto

Wed 12/31

12:00 am-4:00 pm

Nonstop0h 00m

$327

DenverPorto

DEN Denver Intl - OPO Porto

DENOPO

Denver Intl

Tue 2/23

4:15 pm-12:50 pm

1 stop13h 35m

Porto

Wed 12/31

12:00 am-4:00 pm

Nonstop0h 00m

$327

DenverPorto

DEN Denver Intl - OPO Porto

DENOPO

Denver Intl

Sun 4/25

6:40 pm-8:00 pm

2 stops18h 20m

Porto

Wed 12/31

12:00 am-4:00 pm

Nonstop0h 00m

$333
Quickest round-trip

DenverLisbon

DEN Denver Intl - LIS Lisbon Humberto Delgado

DENLIS

Denver Intl

Mon 4/12

3:55 pm-10:30 am

1 stop11h 35m

Lisbon Humberto Delgado

Wed 12/31

12:00 am-4:00 pm

Nonstop0h 00m

$378

DenverFunchal

DEN Denver Intl - FNC Funchal Madeira

DENFNC

Denver Intl

Tue 3/2

9:03 am-1:30 pm

2 stops21h 27m

Funchal Madeira

Wed 12/31

12:00 am-5:00 pm

Nonstop0h 00m

$380

DenverPorto

DEN Denver Intl - OPO Porto

DENOPO

Denver Intl

Sun 5/2

4:00 pm-7:15 am

2 stops32h 15m

Porto

Wed 12/31

12:00 am-4:00 pm

Nonstop0h 00m

$392

DenverFunchal

DEN Denver Intl - FNC Funchal Madeira

DENFNC

Denver Intl

Sun 12/6

3:40 pm-8:05 am

3 stops33h 25m

Funchal Madeira

Wed 12/31

12:00 am-5:00 pm

Nonstop0h 00m

$394

DenverPorto

DEN Denver Intl - OPO Porto

DENOPO

Denver Intl

Tue 2/23

8:59 pm-5:15 pm

3 stops37h 16m

Porto

Wed 12/31

12:00 am-4:00 pm

Nonstop0h 00m

$401

DenverLisbon

DEN Denver Intl - LIS Lisbon Humberto Delgado

DENLIS

Denver Intl

Fri 3/5

5:01 pm-2:55 pm

1 stop14h 54m

Lisbon Humberto Delgado

Wed 12/31

12:00 am-4:00 pm

Nonstop0h 00m

$419

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/2

Showing 1-10 of 54 resultsSorted by cheapest first
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Best time to book a flight from Denver to Portugal

Have a flexible travel schedule? Discover the best time to fly to Portugal from Denver with our price prediction graph.
Estimated round-trip price

Cheapflights Insights

Everything you need to know about your flight from Denver to Portugal

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

Currently, February is the cheapest month in which you can book a flight from Denver to Portugal (average of $638). Flying from Denver to Portugal in June is currently the most expensive (average of $1,334). 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 Denver to Portugal?

The price you pay for your flight from Denver to Portugal may vary depending on when you book. For the best chance of a lower fare, look to book 16 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

Reviews of airlines servicing Portugal

See what other customers who have flown with Turkish Airlines,United Airlines, andAir Canada from Denver to Portugal have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Food

7.5

Overall

7.4

Boarding

7.3

Entertainment

7.5

Crew

7.8

Comfort

7.3

Reviews

1 / 20
6.0
Good

Deborah,Nov 2026

JFK - IST

I got locked out of my earthlink account while using the Turkish Airlines wifi. I am still working on getting it back.

Food

7.5

Overall

7.4

Boarding

7.3

Entertainment

7.5

Crew

7.8

Comfort

7.3

Reviews

1 / 20
6.0
Good

Deborah,Nov 2026

JFK - IST

I got locked out of my earthlink account while using the Turkish Airlines wifi. I am still working on getting it back.

Food

7.5

Overall

7.4

Boarding

7.3

Entertainment

7.5

Crew

7.8

Comfort

7.3

Reviews

1 / 20
6.0
Good

Deborah,Nov 2026

JFK - IST

I got locked out of my earthlink account while using the Turkish Airlines wifi. I am still working on getting it back.

Food

7.5

Overall

7.4

Boarding

7.3

Entertainment

7.5

Crew

7.8

Comfort

7.3

Reviews

1 / 20
6.0
Good

Deborah,Nov 2026

JFK - IST

I got locked out of my earthlink account while using the Turkish Airlines wifi. I am still working on getting it back.

Food

7.5

Overall

7.4

Boarding

7.3

Entertainment

7.5

Crew

7.8

Comfort

7.3

Reviews

1 / 20
6.0
Good

Deborah,Nov 2026

JFK - IST

I got locked out of my earthlink account while using the Turkish Airlines wifi. I am still working on getting it back.

Food

7.5

Overall

7.4

Boarding

7.3

Entertainment

7.5

Crew

7.8

Comfort

7.3

Reviews

1 / 20
6.0
Good

Deborah,Nov 2026

JFK - IST

I got locked out of my earthlink account while using the Turkish Airlines wifi. I am still working on getting it back.

Related info for your journey

  • What airport do you fly from for flights from Denver to Portugal?

    Most people fly from Denver Intl (DEN) if they book a flight from Denver to Portugal. Denver Intl is conveniently located just 18.5 mi from Denver’s city center.

  • How long is the flight from Denver to Portugal?

    For as low as $711, United Airlines can have you in Portugal from Denver in 16h 29m. The distance between Denver and Portugal is about 4747 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from Denver to Portugal one-way?

    The cheapest airlines for a one-way flight from Denver to Portugal are Icelandair ($242), Lufthansa ($309), and British Airways ($326).

  • What are the most popular routes from Denver to Portugal?

  • Can I find deals for flights from Denver to Portugal that include hotel bookings?

    Yes. In addition to deals on Denver to Portugal flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Denver to Portugal?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Denver to Portugal.

  • Can I find deals for business class flights from Denver to Portugal?

    Yes. Cheapflights offers flight deals from Denver 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 Denver to Portugal?

    Currently, February is the cheapest month in which you can book a flight from Denver to Portugal (average of $638). Flying from Denver to Portugal in June is currently the most expensive (average of $1,334). 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

Top 10 airlines flying from Denver to Portugal

AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$464Average$715FlexibilityNo cancel feeOn-time76%
LufthansaCheapest$485Average$1,017FlexibilityNo cancel feeOn-time76%
KLMCheapest$551Average$908FlexibilityNo cancel feeOn-time75%
Virgin AtlanticCheapest$575Average$691FlexibilityNo cancel feeOn-time72%
United AirlinesCheapest$576Average$1,139FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$598Average$886FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$630Average$776FlexibilityNo cancel feeOn-time71%
Turkish AirlinesCheapest$651Average$786FlexibilityNo cancel feeOn-time77%
DeltaCheapest$686Average$1,047FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$700Average$1,062FlexibilityNo cancel feeOn-time67%

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