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DEN - OPO

Find cheap flights from Denver to Porto from $374

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 5/25. 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
0 bags
Mon 6/3
Mon 6/10

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These are the airlines KAYAK users have selected most often from within our search results in flight searches from Denver to Porto.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Denver to Porto.
In the last 7 days travelers have searched 43,693,958 times on KAYAK, and here is why:

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Cheap flight deals 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 and deals for you by selecting your travel dates.
Choose your dates
1:32 pm - 9:45 amDEN-OPO
13h 13m1 stop
12:35 pm - 8:53 pmOPO-DEN
15h 18m1 stop
$1,011United Airlines
Find Deal
Sun, Jun 2 - Wed, Jun 12
1:32 pm - 9:45 amDEN-OPO
13h 13m1 stop
12:35 pm - 11:38 pmOPO-DEN
18h 03m2 stops
$1,015United Airlines
Find Deal
Sun, Jun 2 - Wed, Jun 12
4:16 pm - 10:30 pmDEN-OPO
23h 14m1 stop
6:15 am - 1:13 amOPO-DEN
49h 58m2 stops
$1,033
Find Deal
Sat, Jun 1 - Mon, Jun 24
6:37 am - 9:45 amDEN-OPO
20h 08m1 stop
12:25 pm - 4:20 pmOPO-DEN
34h 55m1 stop
$1,054
Find Deal
Sun, Jun 2 - Sun, Jun 9
12:04 pm - 3:30 pmDEN-OPO
20h 26m2 stops
5:00 am - 10:47 pmOPO-DEN
24h 47m2 stops
$1,092Delta
Find Deal
Tue, Jun 11 - Mon, Jun 24
12:00 pm - 3:30 pmDEN-OPO
20h 30m2 stops
5:00 am - 6:45 pmOPO-DEN
20h 45m2 stops
$1,149Delta
Find Deal
Wed, May 29 - Sat, Jun 8
4:05 pm - 11:20 pmDEN-OPO
24h 15m1 stop
11:10 am - 2:20 pmOPO-DEN
34h 10m1 stop
$1,294Lufthansa
Find Deal
Tue, May 21 - Sun, Jun 2
4:05 pm - 11:20 pmDEN-OPO
24h 15m1 stop
6:15 am - 2:20 pmOPO-DEN
15h 05m1 stop
$1,892Lufthansa
Find Deal
Tue, May 7 - Tue, May 21
12:40 am - 7:35 amDEN-OPO
23h 55m2 stops
12:20 pm - 5:52 pmOPO-DEN
36h 32m2 stops
$2,090American Airlines
Find Deal
Fri, May 31 - Mon, Jun 24
12:40 am - 7:35 amDEN-OPO
23h 55m2 stops
8:15 am - 11:59 pmOPO-DEN
22h 44m2 stops
$2,745American Airlines
Find Deal
Wed, May 29 - Thu, Jun 6

Flights from Denver to Porto - Travel Insights & Trends

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.

What’s the cheapest day of the week to fly from Denver to Porto?

The average price of all flights from Denver to Porto clicked on KAYAK for each day over the last 12 months.
If your flying dates are flexible, you should consider flying to Porto on a Monday, as we generally find the cheapest rates on that day for this route. On the other hand, Tuesday is the most expensive day to fly from Denver to Porto. For your return ticket, we recommend flying on a Monday and avoiding Saturdays for the best deals.

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 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 $786 on average. On the other hand, the most expensive months are July and June, where the average cost of tickets is $1,732 and $1,724 respectively.

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

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for 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 month.
To get a below average price on the flight from Denver to Porto, you should book around 2 weeks before departure. For the absolute cheapest price, our data suggests you should book 43 days before departure.

Which airlines provide the cheapest flights from Denver to Porto?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the last 3 days, United Airlines offered the best one-way deal for that route, at $875. KAYAK users also found Denver to Porto round-trip flights on United Airlines from $1,011 and on Delta from $1,092.

Good to know

Low season

December

High season

September

Cheapest flight

$374
Best time to beat the crowds but there is an average 5% increase in price.
Most popular time to fly and prices are also 2% 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 3 days, the lowest price for a flight from Denver to Porto was $374 for a one-way ticket and $1,011 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, oneworld, and SkyTeam are the airline alliances operating flights between Denver and Porto, with Star Alliance being the most commonly used for this route.

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

    The two airlines most popular with KAYAK users for flights from Denver to Porto are Delta and United Airlines. With an average price for the route of $1,147 and an overall rating of 8.0, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $1,306 and an overall rating of 7.3.

  • 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.

See more FAQs

Top 5 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.
8.0
DeltaOverall score based on 10848 reviews
7.9Comfort
8.0Entertainment
8.6Crew
7.4Food
8.2Boarding
Airline reviews

Checking in at the airport the agent only booked the first keg of my trip and had my checked luggage going to the airport with a layover! Never was issued a boarding pass for the second leg or received sticker fir my checked bag. All was well in the end! Delta agents helped to resolve the situation!!!

8.0 ExcellentAnonymous, May 2024ATL - ATW
Read more about Delta reviews

Checking in at the airport the agent only booked the first keg of my trip and had my checked luggage going to the airport with a layover! Never was issued a boarding pass for the second leg or received sticker fir my checked bag. All was well in the end! Delta agents helped to resolve the situation!!!

Delayed due to an ill passenger after loading. Not preventable on Delta's part. Was in first class. The seats are becoming worn and detaching from their velcro attachments. Only got snacks on flight. The attendant was not the friendliest.

I would fly again the whole experience was great. The only feed back I can give that they don't do that American Airlines does is the crew there is more humorous with boarding and thank their passengers. It makes it more fun to fly with them. I would however fly Delta again.

Big plane, long flight, absolutely no leg room and basically non existent air! I am 5”4’ and always travel Main Cabin, I was miserable on this plane and could barely move when we arrived in Cabo due to the cramped leg area!

From Atlanta to Cabo I would have hoped on a plane that size I would have been able to breathe and wiggle my feet a little! The leg room in that plane is non existent and I am only 5”4’. And the air vent either wasn’t working very well or just could not blow air from the ceiling to the seat area as I was suffocating through the entire flight! And please don’t say I would have been more comfortable in first class because I cannot afford those rates and have always travelled Main Cabin without issues !

The pilots were good. Disappointing when planes don't have electrical ports

I liked the piloting of the aircraft. Very disappointed about lack of electrical ports. Also, although a short flight. there was enough time to hand out snacks to comfort + seats as was done for first class.

I had a wonderful experience flying with delta. The gentleman taking care of us on our flight was so nice, accommodating, and attentive. He always was smiling and giving pins to the kids which made me smile. The flight was quick too and without turbulence. Thank you for the great flying experience.

Delta is one of the best airlines I have flown

Made the Atlanta to Pittsburgh trip many times, with Delta no issues

Generally good but there wasn’t any staff available when my luggage didn’t appear at baggage claim in Fresno. It took about half an hour to locate a staff member to open up the locked room where it was being kept.

Flight delayed from Cape Town to Washington then got diverted to miami and in miami we had to fend for ourselves , im still trying to get to Shreveport now

I just wrote a text which was supposed to be for the flight from Denver to spokane not Frankfurt to Denver.

Good dinner and nice plane.Smootz flight. Breakfast had no sweet option. Seats hardly reclined.

Too many fees (but that seems to apply to all airlines nowadays)

Flight was on time. Staff were friendly. I paid for Economy Plus but was required to check my standard carry-on luggage due to lack of space on the aircraft. This cost me 30 minutes, unexpectedly, in waiting at the baggage claim. This experience did not meet my expectations.

Everything was very good. Boarding and takeoff were on time and organized. Had a good flight

Wheelchair assistance was not complete. The person left me at the departure gate without informing the groundstaff of my requirements. I had to walk to the departure counter to ask for help to reach the plane door. The crew informed me that in future they were not allowed to help passengers like me, senior citizen and Wheelchair passenger with placing their carry on bags in the overhead compartments!

Flight was delayed by over an hour and gate checked bags took 15 minutes to be delivered to the jet bridge.

Seats are way too snug for my hip to knee ratio and the recline on the seat in front of me made my experience worst. My legs had no room at all. Not a plane for people 6 ft or over unless you fly first class.

I liked the friendly crew and desk staff, all very helpful. I was surprised and a little annoyed on my outbound flight from LGW to MCO as I had prepaid and booked my seat, which was all correct at check in on my boarding pass. when I got on the plane someone was in my seat ! I was moved to another seat. The food choice is quite limited and I feel that an option of a muffin for breakfast snack would be welcomed, not everyone wants egg or bacon wrap. The choice of entertainment is good, plenty to keep you busy on a long haul flight. I liked the option offered to have the cabin bag checked into the hold, it saved me as an older, lone traveller lifting my case into the overhead locker or finding there was no space.

good service from crew. Before the would have an option between cookies or nuts as snacks.. Now, there are only cookies. too bad. People who can not have sugar don't have a choice.

I would not fly with BA again. Packed in like sardines, constant request to turn down air conditioning due to freezing cold for hours and the food was pretty to look at but tasteless!

My wife and I paid for seat selection to be together. My wife and I were on separate rows and the excuse they gave was they changed the plane. Also, I have celiac and asked for a gluten free meal in the ticket profile which they did not have.

I’m hoping for WiFi included. Everything else was very good

An average flight experience. For our transatlantic portion, they provided a main meal and two snacks. However, the food was not very tasty and the drinks far too small and infrequent for such a long flight. The regrettable part of the flight was that the toilets were extremely filthy. I feel this is unacceptable.

Rude security cunts. However the lady that issued my boarding ticket when I was flying back from New York was lovely & helpful!!

Appalling! The flight was delayed by 3.5 hours and the American Airlines staff at the airport where nit very helpful. Once boarded, the flight crew were unhelpful, the food was poor and the aircraft was tatty.

The food is really eco only level. Breakfast was shameful. I am considering to stop flying with Iberia. Business prices are as expensive as other companies with much better service.

I called prior to flying to confirm our baggage allowance which was 5 bags. On our outbound flight thee were no problems. On the return flight we were charged for each bag totaling $400! We are working with customer service to resolve the issue.

German crew were very kind. Food was okay but can be better, especially bread was not good, Garbage collection was very poor.

Awful Terrible staff poor communication Flight delayed for an hour with no apology or explanation and no help re missing connecting flight. Resulted in a 7 hour layover at Munich waiting for another connecting flight. Only 15 euros refreshment voucher given. Will not fly Lufthansa again

Both flights were late for what appeared to be the airline’s not having the planes ready. Arrived over 6 hours late.

It was a busy flight and all the crew were very helpful and gracious

Seats were not the most comfortable and food options weren’t great but overall but everything else was excellent

Check-in very easy and smooth. Plane and crew were nice. Seat open next to me created more space. Food was fair but plentiful. Lots of movies and I was able to sleep some on the way to Munich. Very tight connection, about an hour. Fast through passport control and a bit of a walk to last G terminal gate but I made my connection to Palma. Unfortunately, my luggage did not make it. It is now almost 24 hours since I anded and still NO luggage. I know it landed last night on another flight. Local delivery should be today to my hotel in Palma but nothing yet. I asked about the tight connection when I checked in and was assured they would get my luggage to the connecting flight. Very disappointing it missed my flight but more disappointing that it has taken so long to arrive. Failure on the airlines and service to get my luggage to date.

I wish the flight attendant was a little bit kinder

The food wasn’t great and it would be nice if the airlines showed documentaries about the countries we are flying into.

Disappointed everytime. The app doesn't load the boarding passes. They have lots of agent that seem to be busy doing nothing with a long line waiting to get paper boarding passes. Food choices are poor. Entertainment is less than entertaining.

Horrible experience. Nothing to give to kids to keep them entertained.

The seats were tiny, being of a fairly petite build, I don’t usually expect to feel crammed and cramped in a seat, but I definitely was on this flight. I couldn’t even bend over to get anything out from under the seat in front and getting up to go to the bathroom at night with the seat backs reclined was nearly impossible. I had to do gymnastics to get over and out. For an airline that does long flights overnight, it’s kind of ridiculous.

Not connecting flights. Missed my flight from Dublin to Liverpool because I arrived at Dublin one hour too late. For this mistake, they offered me a flight from Dublin to Manchester. Thats great and all, but I waste time and money to commute to Liverpool. Be sure to check the time of your connecting flights, because they sure don’t when they sell it to you

Excellent! Great flight attendants, good food (in business class, at least), very comfortable. Touchscreen and remote wasn’t great.

In economy and food was ok, but with limited leg space (and I was in a 2 seat configuration) it was difficult to eat with a tiny seat tray. I spilt wine on my trousers. First time on British Air (I usually fly Turkish Air) and in a 777. Heathrow was pleasant but changing terminals awkward.

Starting with the flight Cairo to London the plain was so poor no entertainment at all uncomfortable seats although it’s 5 hours long,then an American airline plain took me from London to Miami it was a bad experience the crew most of flight time not available and they asked us to help our selves for any snacks if we need. From Miami to London actually was perfect flight with a huge plain and perfect crew but from London to Cairo was horrible plain with stiff fixed seats not movable no entertainment or wi fi very poor Menu which is unacceptable for a business class

I've done hundreds of flights in my life, and this flight was one of the best I've ever taken, From beginning to end, everything went smoothly, professionally, and with a smile and friendly attitude from all employees I interacted with. The food was delicious (and free), as were the drinks. There was just a genial and effective way in the way that British Airways organized the flight -that reminded of days in the 70's, 80's, and 90's, when flying was a fun, and exciting adventure. I enjoyed and had confidence in the abilities of the flight crew, I'll be flying British Airways several more times this summer. Thank you so much for the great experience! Cheryl Olso

My baggage did not arrived with me. Took 3 days to get it after so may calls and follow up

Terrible! I missed my flight to my final destination and British airlines and American Airlines keep pointing fingers on each other’s. Nobody wants to take responsibility

Terrible. Flight was 3 hours delayed and I missed my other flight to my final destination

Overall, terrific service, accommodations, and experience. Only reason comfort was rated lower was because it was difficult to keep a comfortable sleeping position for the overnight flight, but I also had an economy seat.

Book cheap flights from Denver to Porto

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Denver to Porto found on KAYAK in the last 72 hours.
5/25Sat
3 stops
57h 34mDEN-OPO
$374
5/25Sat
3 stops
57h 34mDEN-OPO
$375
5/29Wed
3 stops
36h 20mDEN-OPO
$395
5/29Wed
3 stops
36h 20mDEN-OPO
$406
5/26Sun
2 stops
57h 29mDEN-OPO
$408
5/26Sun
2 stops
57h 29mDEN-OPO
$409
6/5Wed
1 stopUnited Airlines
13h 20mDEN-OPO
$875
5/26Sun
1 stopUnited Airlines
13h 56mDEN-OPO
$932
5/31Fri
1 stopSWISS
17h 40mDEN-OPO
$1,145
6/4Tue
2 stopsAmerican Airlines
36h 00mDEN-OPO
$2,273

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Last minute flights from Denver to Porto

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from Denver to Porto that are departing in the next 10 days.
5/7Tue
multi-stopTAP AIR PORTUGAL
22h 46mDEN-OPO
5/21Tue
multi-stopTAP AIR PORTUGAL
22h 04mOPO-DEN
$1,698
5/7Tue
multi-stopTAP AIR PORTUGAL
22h 46mDEN-OPO
5/21Tue
multi-stopTAP AIR PORTUGAL
22h 04mOPO-DEN
$1,709
5/7Tue
multi-stopTAP AIR PORTUGAL
13h 35mDEN-OPO
5/21Tue
multi-stopTAP AIR PORTUGAL
20h 59mOPO-DEN
$1,854
5/7Tue
multi-stopLufthansa
24h 15mDEN-OPO
5/21Tue
multi-stopLufthansa
15h 05mOPO-DEN
$1,892
5/7Tue
multi-stopLufthansa
15h 10mDEN-OPO
5/21Tue
multi-stopLufthansa
17h 52mOPO-DEN
$1,925
5/6Mon
multi-stopAmerican Airlines
23h 55mDEN-OPO
5/21Tue
multi-stopAmerican Airlines
18h 31mOPO-DEN
$3,378

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Denver - Porto Flights

Departure:

Denver (DEN)United States

Destination:

Porto (OPO)Portugal

Return flight deals:

Porto - Denver

Cabin classes:

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