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$397+ Cheap flights from Colorado to Porto (OPO)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/9. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — OPO
mai 6 — mai 131
ter 5/6
ter 5/13
1 adult, Economy
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Cheap flight deals from Colorado to Porto

Keep the following information in mind while searching for Colorado to Porto flight deals. Data was last updated maio 1, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$686
(FlightHub)

One-way from

$397
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$1,168
Provider with most accurate pricing for Denver Intl-Porto flight deals.
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Provider most trusted by Cheapflights users for Denver Intl-Porto flights.
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From Colorado to Porto
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One-way flight from Colorado to Porto
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Highest demand for flights based on searches. 22% potential increase in price ($286 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($38 potential savings vs. average RT price).
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Average for round-trip flights in May 2025
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Find flight deals from Colorado to Porto

Cheapest flights from Colorado to Porto
Explore the most affordable flight options available from Colorado to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on maio 1, 2025.

This FlightHub deal was found by Cheapflights users on 5/1. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
seg 10/134:05 pmDEN - OPO
1 stop24h 15mLufthansa
ter 10/216:15 amOPO - DEN
1 stop15h 05mLufthansa
Deal found 5/1$686
This oojo deal was found by Cheapflights users on 4/30. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ter 9/27:50 pmDEN - OPO
1 stop31h 15mTurkish Airlines
qua 9/104:50 pmOPO - DEN
1 stop32h 05mTurkish Airlines
Deal found 4/30$690
This FlightHub deal was found by Cheapflights users on 5/1. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
seg 10/134:05 pmDEN - OPO
1 stop24h 15mMultiple Airlines
ter 10/218:40 amOPO - DEN
2 stops18h 36mMultiple Airlines
Deal found 5/1$692
This United Airlines deal was found by Cheapflights users on 5/1. 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.
sex 10/247:45 amDEN - OPO
2 stops19h 00mUnited Airlines
sáb 11/112:35 pmOPO - DEN
1 stop14h 50mUnited Airlines
Deal found 5/1$697
This American Airlines deal was found by Cheapflights users on 5/1. 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.
seg 10/135:02 pmDEN - OPO
2 stops15h 53mAmerican Airlines
ter 10/2112:20 pmOPO - DEN
2 stops18h 18mAmerican Airlines
Deal found 5/1$712
This Delta deal was found by Cheapflights users on 5/1. 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.
sex 10/2412:45 pmDEN - OPO
2 stops19h 45mDelta
dom 11/25:00 amOPO - DEN
2 stops24h 46mDelta
Deal found 5/1$739
This Air Canada deal was found by Cheapflights users on 5/1. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ter 10/145:40 pmDEN - OPO
2 stops34h 45mAir Canada
sáb 10/256:00 amOPO - DEN
2 stops20h 54mAir Canada
Deal found 5/1$740
This SWISS deal was found by Cheapflights users on 4/30. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sex 5/165:50 pmDEN - OPO
1 stop31h 05mSWISS
sex 5/238:40 amOPO - DEN
1 stop14h 40mSWISS
Deal found 4/30$821

Cheapflights Fare Finder

Customize your flight search to find flights from Colorado 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 2,558,603 searches. Data last updated maio 1, 2025.
Use the filters below to find and compare flights from Colorado to Porto that are best for you.

Fly from

Colorado

Fly to

Porto

Route

Depart

Return

Price

DenverPorto

DEN - OPO

DENOPO

Denver Intl

seg 10/13

4:05 pm-11:20 pm

1 stop24h 15m

Porto

ter 10/21

6:15 am-2:20 pm

1 stop15h 05m

$686

DenverPorto

DEN - OPO

DENOPO

Denver Intl

ter 9/2

7:50 pm-10:05 am

1 stop31h 15m

Porto

qua 9/10

4:50 pm-5:55 pm

1 stop32h 05m

$690

DenverPorto

DEN - OPO

DENOPO

Denver Intl

seg 10/13

4:05 pm-11:20 pm

1 stop24h 15m

Porto

ter 10/21

8:40 am-8:16 pm

2 stops18h 36m

$692

DenverPorto

DEN - OPO

DENOPO

Denver Intl

sex 10/24

7:45 am-9:45 am

2 stops19h 00m

Porto

sáb 11/1

12:35 pm-9:25 pm

1 stop14h 50m

$697

DenverPorto

DEN - OPO

DENOPO

Denver Intl

seg 10/13

5:02 pm-3:55 pm

2 stops15h 53m

Porto

ter 10/21

12:20 pm-11:38 pm

2 stops18h 18m

$712

DenverPorto

DEN - OPO

DENOPO

Denver Intl

sex 10/24

12:45 pm-3:30 pm

2 stops19h 45m

Porto

dom 11/2

5:00 am-11:46 pm

2 stops24h 46m

$739

DenverPorto

DEN - OPO

DENOPO

Denver Intl

ter 10/14

5:40 pm-11:25 am

2 stops34h 45m

Porto

sáb 10/25

6:00 am-7:54 pm

2 stops20h 54m

$740

DenverPorto

DEN - OPO

DENOPO

Denver Intl

sex 5/16

5:50 pm-7:55 am

1 stop31h 05m

Porto

sex 5/23

8:40 am-4:20 pm

1 stop14h 40m

$821

DenverPorto

DEN - OPO

DENOPO

Denver Intl

qua 10/15

2:30 pm-10:45 am

1 stop13h 15m

Porto

sáb 10/25

6:05 pm-8:15 am

1 stop21h 10m

$1,586

DenverPorto

DEN - OPO

DENOPO

Denver Intl

sáb 8/9

12:34 am-5:00 pm

2 stops33h 26m

$397

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Showing 1-10 of 15 results
1
2

Best time to book a flight from Colorado to Porto

Have a flexible travel schedule? Discover the best time to fly to Porto from Colorado with our price prediction graph.
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 Colorado to Porto

What is the cheapest month to book a flight from Colorado to Porto?

Currently, January is the cheapest month in which you can book a flight from Colorado to Porto (average of $523). Flying from Colorado to Porto in June is currently the most expensive (average of $1,071). 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.

What is the cheapest time of day to fly from CO to OPO?

Find hourly flight availability from Colorado to Porto. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated maio 1, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Colorado to Porto as you normally would.

Rainfall in Porto by month

Plan your trip to Porto by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Porto ranges from 0.7 - 7.7 inches per month. December is typically the wettest month, when rainfall can reach 7.7 in. July is typically the driest time to visit Porto when rainfall is around 0.7 in.

Temperature in Porto by month

Plan your trip to Porto by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Porto, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 68.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 48.2 F).

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 maio 1, 2025.
See what other customers who have flown with Delta, SWISS and United Airlines from Colorado to Porto have to say. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,934 reviews

Entertainment

7.9

Boarding

8.2

Food

7.3

Comfort

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,934 reviews
Delta
8.0
Very good
7,934 reviews

Entertainment

7.9

Boarding

8.2

Food

7.3

Comfort

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
SWISS
7.5
Good
1,588 reviews
Delta
8.0
Very good
7,934 reviews

Entertainment

7.9

Boarding

8.2

Food

7.3

Comfort

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,696 reviews
Delta
8.0
Very good
7,934 reviews

Entertainment

7.9

Boarding

8.2

Food

7.3

Comfort

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Turkish Airlines
7.3
Good
3,791 reviews
Delta
8.0
Very good
7,934 reviews

Entertainment

7.9

Boarding

8.2

Food

7.3

Comfort

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,934 reviews

Entertainment

7.9

Boarding

8.2

Food

7.3

Comfort

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

Find useful and relevant information for your journey from Colorado to Porto. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Porto from Colorado?

    Porto (OPO), located 6.8 mi from the city center, is the airport you fly into when you book flights from Colorado to Porto.

  • What are the cheapest airlines to fly from Colorado to Porto one-way?

    $571 is the cheapest one-way deal found within the past few days, from British Airways. You may also be able to find cheap deals on United Airlines and Air Canada, with prices starting from $583 and $603, respectively.

  • Can I find deals for flights from Colorado to Porto that include hotel bookings?

    Yes. In addition to deals on Colorado to Porto flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Colorado to Porto?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Colorado to Porto.

  • Can I find deals for business class flights from Colorado to Porto?

    Yes. Cheapflights offers flight deals from Colorado to Porto by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Colorado to Porto?

    Currently, January is the cheapest month in which you can book a flight from Colorado to Porto (average of $523). Flying from Colorado to Porto in June is currently the most expensive (average of $1,071). 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.

See more FAQs

Traveling to a place near Colorado?

Book flights to Colorado if you plan to visit one of these locations
Aveiro
Coimbra
Matosinhos
Arcos de Valdevez

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Alternative routes for Colorado to Porto

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from Colorado to Porto

Discover the top 5 airlines that operate flights from Colorado 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 2,558,603 searches. Data last updated maio 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$516Average$975FlexibilityNo cancel feeOn-time75%
Turkish AirlinesCheapest$574Average$659FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$662Average$911FlexibilityNo cancel feeOn-time76%
DeltaCheapest$692Average$1,163FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$738Average$1,148FlexibilityNo cancel feeOn-time69%

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