DEN - OPO

$281 Find Cheap Flights from Denver to Porto - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Denver to Porto departing on 7/22. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Porto

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Denver to Porto, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Denver to Porto, as well as popular online travel agencies
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$688
Typical prices: $592-$1,042
Lufthansa
Mon 11/23Fri 11/27
DEN - OPO • 1 stop
Cheapest one-way
$281
Typical prices: $591-$1,252
Multiple Airlines
Wed 7/22
DEN - OPO • 3 stops
Top airlines
Cheapest • from $688 (round-trip)
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Denver and Porto. You'll need at least 1 connection.
Insights
Insights
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Insights
Top layover airports
Cheapest • Avg $905 (round-trip)
Shortest trip • 12h 35m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 52% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 24% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Porto!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Denver to Porto (DEN-OPO)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Denver to Porto that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Denver to Porto

Mon, Nov 23 - Fri, Nov 27
Lufthansa Logo
4:15 pm - 12:50 pm
DEN
-
OPO
13h 35m
1 stop
Lufthansa Logo
6:00 am - 3:35 pm
OPO
-
DEN
16h 35m
1 stop
$688Lufthansa
Sun, Nov 1 - Wed, Nov 11
Lufthansa Logo
4:15 pm - 12:50 pm
DEN
-
OPO
13h 35m
1 stop
Lufthansa Logo
4:10 pm - 3:35 pm
OPO
-
DEN
30h 25m
1 stop
$707Lufthansa
Mon, Nov 23 - Fri, Nov 27
Air Canada Logo
11:15 am - 12:50 pm
DEN
-
OPO
18h 35m
2 stops
Air Canada Logo
6:00 am - 5:18 pm
OPO
-
DEN
18h 18m
2 stops
$713Air Canada
Sun, Nov 1 - Wed, Nov 11
Delta Logo
6:30 am - 9:05 am
DEN
-
OPO
19h 35m
1 stop
Delta Logo
5:00 am - 10:43 pm
OPO
-
DEN
24h 43m
2 stops
$719Delta
Mon, Nov 23 - Fri, Nov 27
United Airlines Logo
5:25 pm - 3:20 pm
DEN
-
OPO
14h 55m
1 stop
United Airlines Logo
6:00 am - 3:35 pm
OPO
-
DEN
16h 35m
1 stop
$722United Airlines
Sun, Nov 1 - Wed, Nov 11
Delta Logo
6:10 am - 9:05 am
DEN
-
OPO
19h 55m
2 stops
Delta Logo
5:00 am - 7:10 pm
OPO
-
DEN
21h 10m
2 stops
$723Delta
Sun, Nov 15 - Sat, Nov 21
Lufthansa Logo
4:15 pm - 12:50 pm
DEN
-
OPO
13h 35m
1 stop
Lufthansa Logo
6:00 am - 3:35 pm
OPO
-
DEN
16h 35m
1 stop
$737Lufthansa
Mon, Nov 23 - Fri, Nov 27
United Airlines Logo
11:15 am - 9:30 am
DEN
-
OPO
15h 15m
2 stops
United Airlines Logo
6:00 am - 3:35 pm
OPO
-
DEN
16h 35m
1 stop
$743United Airlines
Sun, Nov 15 - Sat, Nov 21
Multiple Airlines Logo
11:15 am - 12:50 pm
DEN
-
OPO
18h 35m
2 stops
Multiple Airlines Logo
6:00 am - 3:35 pm
OPO
-
DEN
16h 35m
1 stop
$745Multiple Airlines
Sat, Nov 7 - Sat, Nov 14
Multiple Airlines Logo
11:59 pm - 9:30 am
DEN
-
OPO
26h 31m
2 stops
Multiple Airlines Logo
6:00 am - 3:35 pm
OPO
-
DEN
16h 35m
1 stop
$747Multiple Airlines
Booking Insights

KAYAK's insights & trends for Denver to Porto flights

Get data-powered insights and trends into flights from Denver to Porto to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Denver to Porto?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Denver to Porto departing in November.

What is the cheapest month to fly from Denver to Porto?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Denver to Porto, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Denver to Porto is February, where tickets cost $757 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is $1,282 and $1,254 respectively.

How far in advance should I book a flight from Denver to Porto?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Denver to Porto, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Denver to Porto, you should book around 2 weeks before departure, which saves you about 52% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 16 weeks before departure.

Good to know

Low seasonFebruary
Cheapest flight$281
Best time to beat the crowds with an average 25% drop in price.
Most popular time to fly and prices are also 4% lower on average.
Flight from Denver to Porto

When to book flights from Denver to Porto

Are your dates flexible? Find out the best times to travel from Denver to Porto based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Denver to Porto

  • What is the cheapest flight from Denver to Porto?

    In the last 5 days, the lowest price for a flight from Denver to Porto was $264 for a one-way ticket and $688 for a round-trip.

  • Do I need a passport to fly between Denver and Porto?

    Yes, you’ll need a passport to travel to Porto from Denver.

  • Which airports will I be using when flying from Denver to Porto?

    When flying out of Denver you will be using Denver Intl. You will be landing at Porto, also known as Porto.

  • Which aircraft models fly most regularly from Denver to Porto?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Denver to Porto?

    Star Alliance is the only airline alliance operating flights between Denver and Porto.

  • Which is the best airline for flights from Denver to Porto, United Airlines or Turkish Airlines?

    The two airlines most popular with KAYAK users for flights from Denver to Porto are United Airlines and Turkish Airlines. With an average price for the route of $977 and an overall rating of 7.4, United Airlines is the most popular choice. Turkish Airlines is also a great choice for the route, with an average price of $746 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from Denver to Porto?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Denver to Porto.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Denver to Porto?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Porto from Denver is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Denver to Porto?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Porto with an airline and back to Denver with another airline. Booking your flights between Denver and OPO can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Denver to Porto?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Porto from Denver up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 4 airlines serving from Denver to Porto

 
See real verified KAYAK customer reviews for airlines flying from Denver to Porto. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Denver to Porto? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
Turkish AirlinesOverall score based on 4412 reviews
7.5Entertainment
7.5Food
7.3Boarding
7.3Comfort
7.8Crew
Airline reviews

Three screaming and crying children in business class made it very difficult to rest. The crew made no attempt to address the situation. I might as well have saved the money and flown economy. The parents were oblivious to the discomfort their children were causing. The lounge in Istanbul is wonderful, but did not make up for the misery on the flight. My business class seat power outlet was broken and I have a cpap. The crew couldn't fix it or move me to better seat. Fortunately , the passenger in front of me allowed me to plug into his power outlet.

4.0 OkayStephen, Jun 2026
ATL - IST
Read more Turkish Airlines reviews

Three screaming and crying children in business class made it very difficult to rest. The crew made no attempt to address the situation. I might as well have saved the money and flown economy. The parents were oblivious to the discomfort their children were causing. The lounge in Istanbul is wonderful, but did not make up for the misery on the flight. My business class seat power outlet was broken and I have a cpap. The crew couldn't fix it or move me to better seat. Fortunately , the passenger in front of me allowed me to plug into his power outlet.

Could have been better. Bag rechecking could have been eliminated. Gate location and direction need to be clearly stated.

I flew Business with my daughter and son. The service, friendliness of the staff and the comfort of the fully flat beds were phenomenal. Would definitely fly Turkish again soon.

Entertainment system is okay, flight attendants were ok. Leg space very narrow, I couldn’t get what I wanted to eat, dinner nor breakfast.

Excellent experience with business class area. Staff was attentive and food was amazing. Only one bathroom for business class which was logistically difficult for the staff while preparing meals. Need to offer fluids with meals. I did not get enough water to drink. But overall I rate it 5 star.

On time, great food, good drink selection! Only down was alcohol-free lounge. Lufthansa had a much better offering!

Be honest of what you sell: This was sold as Business Class on all three legs, while the JetBlue plane didn't even have business class seats, and wanted $164 for extra legroom seats.

Seat assignments for family traveling with 2 children. Loud crowd during sleep time

It was crowded… the bathrooms dirty and smelly. The seats have been made even smaller.

delayed to take off from detroit by 3 hours lost baggage in istanbul and now in venice without baggage

Very easy ! Use the kiosk and bag drop and right to security within 10 min

The entertainment they offer could use some games, and maybe they could add some cookies to the snack menu. And the automated messages are a bit repetitive. But it was comfortable temperature wise and the seats were comfortable. The crew is very polite and helpful

This planes staff was top tier. Everything went great and had a great flight home.

Destroyed my suitcase. Tired of talking about it. Cancelling my unite mileage plus account.

New plane was lovely. Crew customer service is always lax but expected. Kraft on time and arrived safely.

It was a short flight so I was expecting too much

Had a one hour delay due to mechanical issue. I didn’t think I’d be able to make my connecting flight, but they waited for me and greeted me when I arrived to help things run smooth.

O’hsre taxi and deboarding took 40 minutes. Needed 20 minutes extra time between connecting flights to avoid running through terminal.

Was great in general, try to respect time and excuses when slight changes have been made, appreciated!

Really hard landing... as in slammed into the runway then hit the brakes really hard ...

Food options were ok but the actual meal was terrible. On my way back, they simply said that there was no vegetarian option; somehow they struggled to get one meal and did not give me any breakfast at all which in my opinion was terrible. Never had such an experience in the recent years.

1didnt have wheel chair I ordered wheel chair in my ticket flight

Flight was overbooked and seats assigned to multiple passengers. Delay 1 hour to sort out.

Good but I don’t received my bags yet is been 5days still no update

It was pretty straight forward, no glitches or hidden costs

It was a short flight so, everything went smoothly and we got to where we needed to be safely.

Didn’t make it on the flight. Delayed then had to be rebooked, which in turn had me waiting at the airport for another 8 hours before next flight

No TV on the flight. The charging outlet was not working. No food, even a sandwich. The served orange was poor quality.

Selected seats 5 months prior to date. Had email confirmation and seats were not honoured. Family did not sit together

Loved and was pleasantly surprised by the food!! Request Lufthansa to help transiting passengers at Munich (confusion whether to go thru passport control or not).

The flight was cancelled, so why are you asking me how the flight was?

We sat in our seats on the tarmac for almost 3 hours due to storms. They would not give us water or a snack. We were to depart at 7.30 pm and it was about 10.30 when we took off. No dinner until much after that. Beef type noodle dish was terrible with about a teaspoon of beef in it. The breakfast sweet waffle with egg and sausage inside was horrible. An English muffin sandwich would have been much better. Food was the worst in all of our years of traveling the world.

Our screen kept turning off ...3 times...had to get crew attention to turn it on again

They messed up my seat so I didn’t get the one I paid for

Put me on standby; flight was late; missed my connecting flight; disaster

Flight attendants were fine, seats a bit hard but I use a cushion for extra support. The only issue was it was a bit too cool and I needed to ask for and received and extra blanket. I survived!!!

Very few things and/or people are excellent. It was very good.

Extremely uncomfortable seats. Experience was like a Frontier Airlines flight. Would not fly it again.

Very, very tight legroom. They must’ve jammed in an additional few rows of seat seating. Denver to Munich was the least legroom I’ve ever had on any flight, let alone a multi hour international journey. I will not take that flight again.

In my first flight with Air Canada we sat in the plane for 4:00pm to 6:30pm. Finally we were asked to get off the plane and we were told the flight was cancelled after 7:00pm There was o clear explanation of what was the problem. I was booked without my permission on a Delta Flight at 7:30pm that was leaving at 8:00pm and I still had to go get my luggage(my final destination was Rome with one stop in Toronto. The luggage claim for Canada was closed so had to return to finally get it on the luggage belt.. Of course I missed the Delta flight and all the next day flights were booked. I also lost what I paid for my stay in Rome because I did nt cancel in time. A complete nightmare.

Everything you need to know for your flight from Denver to Porto

Information on your arrival and departure airports