Cheap Flights from Denver to Porto

Compare Denver to Porto flight deals

Find the cheapest month or even day of the year to fly to Porto

Book the best Porto fare with no extra fees

Flight deals from Denver to Porto

Looking for a cheap last-minute deal or the best return flight from Denver to Porto? Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Denver to Porto

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Denver to Porto flights are currently cheapest in October.

Denver to Porto: Alternative routes

Compare routes from Denver to Porto below. You may find an airport to fly into that's cheaper, faster, or easier than Porto.

Denver to Porto: Flight information

The things to know before you go.
Cheapest flight foundR 3,565
Cheapest month to flyOctober

Finding cheap flights from Denver to Porto: Frequently asked questions

The best price we found for a return flight from Denver to Porto is R 7,771. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Denver to Porto. But we found flights with one stop from R 7,771.
As of February 2026, there are no flights flying from Denver to Porto.
The cheapest month to fly from Denver to Porto is usually November.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Denver to Porto Airport on Wednesday, 11 November 2026.
No airlines currently offer direct flights between Denver and Porto Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Porto but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Porto is around 40 days in advance, so don’t leave your flight to the last minute.
The cheapest airline that flies to Porto is United .

Flying from Denver to Porto Airport (OPO): What you need to know

  • Planning your holiday starts with figuring out where you'll fly out of in Denver. Denver International Airport (DEN) is the city's main airport, so check out your options for reserving a flight from Denver to Porto Airport (OPO) out of here.

  • Porto Airport is located in Porto. The city operates on the UTC+0 timezone and is six hours ahead of Denver.

  • To ensure you get on your flight from Denver to OPO, allow plenty of time to navigate the airport and find your gate. Arriving two hours before international departures and one hour before domestic flights is the general travel rule.

  • With more people on the move during high season, it's wise to be at your terminal even earlier. Two hours for domestic flights and up to four for international journeys will allow for additional wait times.

Airports in Denver

Denver International Airport (DEN)

  • Stopovers are the perfect opportunity to break up your journey and perhaps even explore a different city. When browsing cheap flights from Denver to OPO leaving from Denver International Airport (DEN), deselect the 'Direct flights only' box to find all potential stops. Popular options include:

    • Newark Liberty International Airport (EWR)

    • Pearson International Airport (YYZ)

    • Montreal-Pierre Elliott Trudeau International Airport (YUL)

  • The journey from central Denver to DEN takes around 1 hour 30 minutes by public transport. If you drive, ride-share or take a cab, you'll cover the 40 kilometres in 35 minutes or so, depending on traffic.

  • Booking a night at a hotel can take the hassle out of reaching the airport on time. If you're searching for a place to stay before your flight from Denver to Porto Airport, check out Baymont by Wyndham Denver International Airport. It's a short drive from Denver International Airport.

  • Denver International Airport has a strong on-time performance, reducing the likelihood of delays. Departures from DEN arrive at their destination as scheduled 80.23% of the time.

  • The address for DEN is 8500 Pena Boulevard.

About Porto Airport (OPO)

  • Have a late flight from Denver to Porto Airport? Don't let it hijack your sleep schedule. Stay at one of these hotels near OPO and shut your eyes sooner:

  • Get on the fast track to adventure by picking up a Porto Airport rental car. Grab a set of wheels from Klass Wagen, Goldcar or Drive & Go and experience the lesser-explored corners of Porto and beyond.

  • For the lowest price, reserve your vehicle around three weeks in advance of your Denver to Porto Airport flight.

Getting from Porto Airport (OPO) to central Porto

  • The centre of Porto is about 11 kilometres from Porto Airport. Travel times by cab or car hire will vary based on traffic conditions, so do some research ahead of time.

  • It takes around 50 minutes when travelling by public transport.

How to find the cheapest flights from Denver to Porto Airport (OPO)

  • R 3,565 is the best price for a one-way ticket from Denver to Porto Airport. A return flight starts from R 7,771. These prices may change depending on availability and demand.

  • Booking ahead of time is often the key to scoring a cheap flight from Denver to OPO. Fares tend to rise as demand increases, so the closer your departure date, the more you'll likely spend on your ticket.

  • The 'Whole month' search tool shows you the cheapest Denver to Porto Airport tickets across each month. It's a good way to snap up a bargain if your travel plans aren't set in stone.

  • Save time searching for cheap plane tickets from Denver to OPO by creating a Price Alert. We'll send you an email or notification on the app when prices go down.

  • Uncover a great deal on a flight from Denver to Porto Airport with the help of the filters. Pick your ideal departure and arrival times, airlines and number of stops. You can also sort your results by 'Fastest,' 'Cheapest' or 'Best.'

The best time to fly from Denver to Porto Airport (OPO)

  • February is the quietest month for flights from Denver to Porto Airport (OPO), while August is the most popular. Find the best time to visit Porto based on whether you like a laid-back vibe or a lively atmosphere.

  • Book a Denver to OPO plane ticket departing in August if you're eager to experience the city during its warmest month. Expect temperatures in Porto to range from 14ºC (57ºF) to 32ºC (90ºF).

  • If you'd rather travel in cooler conditions, look for a cheap ticket from Denver to Porto Airport in January when temperatures are between 3ºC (37ºF) and 14ºC (57ºF).

More about Porto

  • Start your Porto trip right by choosing the ideal place to stay. Once you've booked your flight from Denver to Porto Airport, check out our range of hotels including:

  • Ribeira District and Rio Douro are just the start of the popular attractions to put on your Porto itinerary. Keep the sightseeing going at Livraria Lello.

Explore more of Portugal

  • Porto has plenty to offer, but there are so many other corners of Portugal waiting to be discovered. Around 290 kilometres south of Porto, a visit to Lisbon will keep you busy. Start with leading sights like belém, Pasteis de Belém and Real Mosteiro de Santa Maria de Belém.

  • Around 274 kilometres south of Porto, Amadora is another favourite stop in Portugal. Experience the best of this destination with a visit to Roman Villa, Park Fonte das Avencas and Park Fantasia.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.