Cheap flights from Denver to Porto from $311
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 Porto departing on 7/27. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Discover deals from 900+ travel sites with momondo.
Save money when you book flights with momondo
Big names and deals
Big names and deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customize your results.Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Find the cheapest flights from Denver to Porto
Cheap round-trip flights
Cheap one-way flights
American Airlines flights from Denver to Porto
Our best American Airlines deals on Denver to Porto flight tickets
United Airlines flights from Denver to Porto
Our best United Airlines deals on Denver to Porto flight tickets
See travel insights to Porto from
How to get the cheapest flight ticket from Denver to Porto
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 Porto?
The month of January is, on average, the cheapest month to fly to Porto from Denver, with most prices found around $710. If you aren’t able to travel during the month of January, then book flights to Porto from Denver during November instead. Flights to Porto in November, while not as cheap as those in January, still average around $747.
What is the cheapest day to depart on your flight to Porto?
The cheapest day to depart on your flight to Porto is on a Monday when prices can be found for as low as $1,053. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $1,233. These prices are subject to change though, so be sure to set up a Price Alert for flights to Porto.
What is the cheapest time of day to depart on your flight to Porto?
In the evening is the cheapest time of day to fly from Denver to Porto when you can find flight prices for as low as $982. Flying to Porto in the evening is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $1,448 on average. Flights to Porto from Denver at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.
How far in advance should I book a flight to Porto?
You are more likely to see cheaper flights to Porto from Denver when booking 19 weeks ahead of your departure date. In general, you can expect to find flights to Porto for around $1,000 when searching 19 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Porto from Denver for as low as $873 on momondo.
What is the cheapest airline that flies from Denver Intl to Porto?
American Airlines, United Airlines, and Air Canada are the most popular carriers operating from Denver Intl to Porto
What airlines fly to Porto?
United Airlines, Lufthansa and Delta are the top three most popular airlines that fly to Porto from Denver according to our data. United Airlines is the first choice among our users, with 50% of people opting to fly with this airline when traveling to Porto. Keep in mind that there are 5 different airlines that fly to Porto on a routine basis, so you have a few additional options to choose from.
When to book flights from Denver to Porto
Cheap Denver to Porto (DEN to OPO) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Denver to Porto
How far is Denver Intl to Porto by plane?
A flight from Denver Intl to Porto will travel around 4771.4 mi. Flights usually cover this in 12h 40m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from Denver Intl Airport to Porto Airport?
Prices for flights from Denver Intl Airport to Porto Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Denver Intl Airport to Porto Airport?
As of April 2025, there are 5 operators available to choose from for flights from Denver Intl Airport to Porto Airport.
How old do you have to be to fly from Denver Intl Airport to Porto Airport?
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 Porto Airport.
What documentation or ID do you need to fly to Porto Airport?
The required travel and health documents for your Porto Airport 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 Porto Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular airline from Denver to Porto?
Based on momondo bookings for flights between Denver and Porto, the leading airline is United Airlines, making up 48% of the total bookings. Other popular airlines include Lufthansa with 27%, Delta with 13%, and Turkish Airlines with 8%.
Best airlines flying from Denver to Porto
Compare and see reviews for airlines that fly from Denver to Porto with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $516 | Free Cancellation | Rating 7.8 1,334 reviews | |||
| PriceFrom $574 | Free Cancellation | Rating 7.3 3,790 reviews | |||
| PriceFrom $662 | Free Cancellation | Rating 6.7 7,046 reviews | |||
| PriceFrom $692 | Free Cancellation | Rating 8.0 7,934 reviews | |||
| PriceFrom $742 | Free Cancellation | Rating 7.4 8,696 reviews |
Traveling to a place near Porto?
Book flights to Porto if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from Denver to Porto?
We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Denver to Porto for you.
Can I find flights from Denver to Porto with flexible booking policies on momondo?
Yes. All flights to Porto from Denver on momondo can be compared and filtered by various policies on offer, including flexible booking.
How can momondo help me find flights from Denver to Porto?
momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Denver to Porto.
I’m not ready to book a flight from Denver to Porto right now. Can momondo alert me if prices change?
Yes. momondo can track prices for Denver to Porto flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.