$329+ Cheap flights from Denver (DEN) to Porto (OPO)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/6. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — OPO
Dec 9 — Dec 161
Round-trip
1 adult, Economy
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Find cheap flights from Denver to Porto with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Denver to Porto
Cheapest
Best
Last-minute
One-way
Cheapest flights from Denver to PortoExplore the most affordable flight options available from Denver to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 9, 2026.
Explore the most affordable flight options available from Denver to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 9, 2026.
This Mytrip deal was found by Cheapflights users on 11/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/51:30 pm -
2 stops23h 40m
Sat 12/127:50 pm -
2 stops28h 00m
Deal found 11/7![Multiple Airlines logo]()
$567
This Gotogate deal was found by Cheapflights users on 11/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/64:15 pm -
1 stop13h 35m
Mon 12/211:45 pm -
1 stop31h 45m
Deal found 11/7![Lufthansa logo]()
$751
This United deal was found by Cheapflights users on 11/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/67:45 am -
2 stops18h 45m
Mon 12/211:45 pm -
1 stop31h 45m
Deal found 11/7![Multiple Airlines logo]()
$758
This Booking.com deal was found by Cheapflights users on 11/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/62:35 pm -
2 stops19h 10m
Mon 12/215:35 pm -
2 stops28h 57m
Deal found 11/7![British Airways logo]()
$815
This Globehunters deal was found by Cheapflights users on 11/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Globehunters is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/45:25 pm -
1 stop22h 00m
Sat 11/146:00 am -
1 stop16h 35m
Deal found 11/4![Lufthansa logo]()
$854
Best flights from Denver to PortoDiscover carefully curated flight deals from Denver to Porto that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated November 9, 2026.
Discover carefully curated flight deals from Denver to Porto that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated November 9, 2026.
This Delta deal was found by Cheapflights users on 11/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/26:05 am -
2 stops21h 30m
Fri 3/55:00 am -
2 stops21h 47m
Deal found 11/8![Delta logo]()
$727
This United Airlines deal was found by Cheapflights users on 11/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/1811:50 pm -
2 stops26h 55m
Sun 4/256:00 am -
1 stop16h 40m
Deal found 11/8![United Airlines logo]()
$767
This Turkish Airlines deal was found by Cheapflights users on 11/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/76:15 am -
2 stops26h 20m
Fri 5/284:35 pm -
1 stop32h 45m
Deal found 11/8![Turkish Airlines logo]()
$986
This KLM deal was found by Cheapflights users on 11/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/1510:45 am -
2 stops16h 45m
Thu 5/2711:45 am -
2 stops17h 48m
Deal found 11/8![KLM logo]()
$1,017
This TAP AIR PORTUGAL deal was found by Cheapflights users on 11/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure TAP AIR PORTUGAL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/72:20 pm -
1 stop12h 40m
Fri 5/285:40 pm -
1 stop34h 57m
Deal found 11/8![TAP AIR PORTUGAL logo]()
$1,056
This Delta deal was found by Cheapflights users on 11/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/116:45 am -
2 stops20h 45m
Thu 4/2211:45 am -
2 stops18h 14m
Deal found 11/9![Delta logo]()
$728
This Delta deal was found by Cheapflights users on 11/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/184:00 pm -
2 stops19h 20m
Sun 4/255:55 am -
2 stops18h 50m
Deal found 11/5![Delta logo]()
$786
Last-minute flights from Denver to PortoDiscover last-minute flight deals from Denver to Porto. Data last updated November 9, 2026 and is based on user searches.
Discover last-minute flight deals from Denver to Porto. Data last updated November 9, 2026 and is based on user searches.
This Mytrip deal was found by Cheapflights users on 11/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/51:30 pm -
2 stops23h 40m
Sat 12/127:50 pm -
2 stops28h 00m
Deal found 11/7![Multiple Airlines logo]()
$567
This Gotogate deal was found by Cheapflights users on 11/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/64:15 pm -
1 stop13h 35m
Mon 12/211:45 pm -
1 stop31h 45m
Deal found 11/7![Lufthansa logo]()
$751
This United deal was found by Cheapflights users on 11/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/61:47 pm -
1 stop12h 43m
Mon 12/211:45 pm -
1 stop31h 45m
Deal found 11/7![Multiple Airlines logo]()
$758
This Booking.com deal was found by Cheapflights users on 11/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/62:35 pm -
2 stops19h 10m
Mon 12/215:35 pm -
2 stops28h 57m
Deal found 11/7![British Airways logo]()
$815
This Booking.com deal was found by Cheapflights users on 11/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/63:40 pm -
2 stops20h 10m
Thu 12/108:05 pm -
3 stops35h 03m
Deal found 11/4![Multiple Airlines logo]()
$864
One-way flights from Denver to PortoSearch for one-way flight options from Denver to Porto. Find affordable one-way fares based on user searches. Data last updated November 9, 2026.
Search for one-way flight options from Denver to Porto. Find affordable one-way fares based on user searches. Data last updated November 9, 2026.
This Expedia deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/611:25 am -
2 stops41h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/6![Multiple Airlines logo]()
$329
This Expedia deal was found by Cheapflights users on 11/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/35:02 pm -
2 stops23h 28m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/5![Lufthansa logo]()
$331
This Kiwi.com deal was found by Cheapflights users on 11/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/33:40 pm -
3 stops23h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/5![Multiple Airlines logo]()
$348
This Ovago deal was found by Cheapflights users on 11/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/311:15 am -
1 stop15h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/5![Brussels Airlines logo]()
$364
This Expedia deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/64:00 pm -
1 stop24h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/6![Lufthansa logo]()
$401
This Justfly.com deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/75:15 pm -
2 stops15h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/6![Iberia logo]()
$470
This American Airlines deal was found by Cheapflights users on 11/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/78:40 am -
1 stop16h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/4![American Airlines logo]()
$471
This Cheapflightsfares deal was found by Cheapflights users on 11/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/79:40 am -
2 stops19h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/4![Brussels Airlines logo]()
$473
This Kiwi.com deal was found by Cheapflights users on 11/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/19:35 am -
3 stops39h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/8![Multiple Airlines logo]()
$1,111
This Delta deal was found by Cheapflights users on 11/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/16:30 am -
1 stop21h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/8![Delta logo]()
$1,131
This AranGrant deal was found by Cheapflights users on 11/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure AranGrant is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/18:50 am -
2 stops19h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/8![Iberia logo]()
$1,156
Find flight deals from Denver to Porto
Discover tips and strategies to find the most affordable flight options for your journey from Denver (DEN) to Porto (OPO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated November 9, 2026.
Most accurate provider | Ovago 3 stars |
|---|---|
Most trusted provider | Ovago 3 stars |
Round-trip from | $567 (Mytrip) |
One-way from | $329 (Expedia) |
Popular in | June |
Cheapest in | February |
Average price | $776 |
Cheapflights Fare Finder
Customize your flight search to find flights from Denver to Porto that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated November 9, 2026.
Use the filters below to find and compare flights from Denver to Porto that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
DenverPorto
DEN Denver Intl - OPO Porto
DENOPO
Denver Intl
Wed 3/3
5:02 pm-11:30 pm
2 stops23h 28m
Porto
Wed 12/31
12:00 am-4:00 pm
Nonstop0h 00m
$331
DenverPorto
DEN Denver Intl - OPO Porto
DENOPO
Denver Intl
Wed 3/3
3:40 pm-10:25 pm
3 stops23h 45m
Porto
Wed 12/31
12:00 am-4:00 pm
Nonstop0h 00m
$348
Quickest round-trip
DenverPorto
DEN Denver Intl - OPO Porto
DENOPO
Denver Intl
Wed 3/3
11:15 am-9:30 am
1 stop15h 15m
Porto
Wed 12/31
12:00 am-4:00 pm
Nonstop0h 00m
$364
DenverPorto
DEN Denver Intl - OPO Porto
DENOPO
Denver Intl
Tue 4/6
4:00 pm-11:25 pm
1 stop24h 25m
Porto
Wed 12/31
12:00 am-4:00 pm
Nonstop0h 00m
$401
DenverPorto
DEN Denver Intl - OPO Porto
DENOPO
Denver Intl
Tue 4/6
4:00 pm-8:00 am
3 stops33h 00m
Porto
Wed 12/31
12:00 am-4:00 pm
Nonstop0h 00m
$440
DenverPorto
DEN Denver Intl - OPO Porto
DENOPO
Denver Intl
Fri 5/7
8:40 am-8:15 am
1 stop16h 35m
Porto
Wed 12/31
12:00 am-4:00 pm
Nonstop0h 00m
$471
DenverPorto
DEN Denver Intl - OPO Porto
DENOPO
Denver Intl
Fri 5/7
9:40 am-12:05 pm
2 stops19h 25m
Porto
Wed 12/31
12:00 am-4:00 pm
Nonstop0h 00m
$473
DenverPorto
DEN Denver Intl - OPO Porto
DENOPO
Denver Intl
Tue 3/2
6:05 am-10:35 am
2 stops21h 30m
Porto
Fri 3/5
5:00 am-7:47 pm
2 stops21h 47m
$727
DenverPorto
DEN Denver Intl - OPO Porto
DENOPO
Denver Intl
Sun 4/11
6:45 am-10:30 am
2 stops20h 45m
Porto
Thu 4/22
11:45 am-10:59 pm
2 stops18h 14m
$728
DenverPorto
DEN Denver Intl - OPO Porto
DENOPO
Denver Intl
Sun 4/18
11:50 pm-9:45 am
2 stops26h 55m
Porto
Sun 4/25
6:00 am-3:40 pm
1 stop16h 40m
$767
Showing 1-10 of 16 resultsSorted by cheapest first
Compare providers for flights from Denver to Porto
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Denver to Porto in November.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Denver-Porto flights, users find the pricing of Ovago to be most consistent on Cheapflights vs. Ovago Users can find the same prices on Denver-Porto flight deals on Cheapflights vs. Ovago >95% of the time. Price accuracy is based on data collected from Denver-Porto flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Denver-Porto flights, Cheapflights users trust Ovago the most. Ovago has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Denver-Porto flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Denver to Porto
Have a flexible travel schedule? Discover the best time to fly to Porto from Denver with our price prediction graph.
DEN-OPO
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Denver to Porto
How far ahead should I book a flight from Denver to Porto?
The best time to book flights from Denver to Porto is 60 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest month to book a flight from Denver to Porto?
Currently, February is the cheapest month in which you can book a flight from Denver to Porto (average of $695). Flying from Denver to Porto in June is currently the most expensive (average of $1,278). 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 much does it cost to fly round-trip from Denver to Porto?
Airfare is below average for this route at the moment.
Denver to Porto flights typically cost between $688 and $926 in December.The cheapest round-trip price found within the last 5 days was $567 on Multiple Airlines (Dec 5-Dec 12).
Reviews of airlines servicing Porto
Get insights into the airlines that provide service to Porto. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Porto. Reviews last updated November 9, 2026.
Get a feel of what it's like to fly with Delta,Turkish Airlines, andUnited Airlines from Denver to Porto by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.5
Entertainment
7.8
Boarding
8.1
Food
7.2
Comfort
7.8
Overall
7.8
Reviews
1 / 20
6.0
GoodEllen,Oct 2026
GRR - ATL
Crew
8.5
Entertainment
7.8
Boarding
8.1
Food
7.2
Comfort
7.8
Overall
7.8
Reviews
1 / 20
6.0
GoodEllen,Oct 2026
GRR - ATL
Crew
8.5
Entertainment
7.8
Boarding
8.1
Food
7.2
Comfort
7.8
Overall
7.8
Reviews
1 / 20
6.0
GoodEllen,Oct 2026
GRR - ATL
Crew
8.5
Entertainment
7.8
Boarding
8.1
Food
7.2
Comfort
7.8
Overall
7.8
Reviews
1 / 20
6.0
GoodEllen,Oct 2026
GRR - ATL
Crew
8.5
Entertainment
7.8
Boarding
8.1
Food
7.2
Comfort
7.8
Overall
7.8
Reviews
1 / 20
6.0
GoodEllen,Oct 2026
GRR - ATL
Crew
8.5
Entertainment
7.8
Boarding
8.1
Food
7.2
Comfort
7.8
Overall
7.8
Reviews
1 / 20
6.0
GoodEllen,Oct 2026
GRR - ATL
Related info for your journey
Find useful and relevant information for your journey from Denver to Porto. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Porto?
Book flights to Porto if you plan to visit one of these locationsVila Nova de Gaia
Arcos de Valdevez
Coimbra
Aveiro
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Denver and Porto flights
Browse other Denver and Porto flight options. Last updated on November 9, 2026.
Other flights from Denver
Browse through other flights departing from Denver. Flights are based on user searches made on Cheapflights and were last updated on November 9, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to Porto
Explore flights to Porto departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on November 9, 2026.
Top 5 airlines flying from Denver to Porto
Discover the top 5 airlines that operate flights from Denver to Porto. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated November 9, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$485 | Average$1,002 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$618 | Average$968 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$700 | Average$1,084 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$701 | Average$785 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$933 | Average$1,154 | FlexibilityNo cancel fee | On-timeN/A |