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$375+ 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 4/8. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — OPO
Apr 6 — Apr 131
Sun 4/6
Sun 4/13
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 April 1, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$683
(oojo)

One-way from

$375
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$854
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. 24% potential increase in price ($323 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($42 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 1, 2025.

This United Airlines deal was found by Cheapflights users on 3/31. 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.
Wed 10/221:25 pmDEN - OPO
1 stop13h 20mUnited Airlines
Thu 11/66:00 amOPO - DEN
2 stops41h 38mUnited Airlines
Deal found 3/31$622
This Lufthansa deal was found by Cheapflights users on 4/1. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/134:05 pmDEN - OPO
1 stop24h 15mLufthansa
Tue 10/216:15 amOPO - DEN
1 stop15h 05mLufthansa
Deal found 4/1$654
This oojo deal was found by Cheapflights users on 4/1. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/307:50 pmDEN - OPO
1 stop31h 15mTurkish Airlines
Mon 10/134:50 pmOPO - DEN
1 stop32h 05mTurkish Airlines
Deal found 4/1$683
This Air Canada deal was found by Cheapflights users on 4/1. 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.
Tue 9/165:40 pmDEN - OPO
1 stop32h 45mAir Canada
Tue 9/3012:50 pmOPO - DEN
1 stop28h 28mAir Canada
Deal found 4/1$686
This Orbitz deal was found by Cheapflights users on 3/30. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/115:45 pmDEN - OPO
1 stop14h 30mMultiple Airlines
Thu 1/87:30 pmOPO - DEN
2 stops45h 58mMultiple Airlines
Deal found 3/30$699
This Gurufare deal was found by Cheapflights users on 4/1. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/246:35 pmDEN - OPO
2 stops31h 05mBritish Airways
Sat 11/18:20 amOPO - DEN
2 stops21h 18mBritish Airways
Deal found 4/1$716
This Delta deal was found by Cheapflights users on 3/31. 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.
Mon 10/133:45 pmDEN - OPO
2 stops19h 10mDelta
Tue 10/216:30 amOPO - DEN
2 stops22h 10mDelta
Deal found 3/31$745
This KLM deal was found by Cheapflights users on 3/30. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/2911:15 amDEN - OPO
2 stops16h 25mKLM
Tue 5/611:25 amOPO - DEN
2 stops19h 15mKLM
Deal found 3/30$830
This American Airlines deal was found by Cheapflights users on 3/31. 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.
Mon 9/159:03 amDEN - OPO
2 stops19h 37mAmerican Airlines
Sat 9/278:15 amOPO - DEN
2 stops21h 12mAmerican Airlines
Deal found 3/31$845
This SWISS deal was found by Cheapflights users on 3/31. 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.
Mon 5/195:50 pmDEN - OPO
1 stop34h 40mSWISS
Mon 6/27:20 pmOPO - DEN
2 stops52h 03mSWISS
Deal found 3/31$859

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 April 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

Sun 9/14

7:50 pm-9:50 am

1 stop31h 00m

Porto

Mon 9/29

4:50 pm-5:55 pm

1 stop32h 05m

$683

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Tue 9/16

7:15 pm-9:25 am

2 stops31h 10m

Porto

Tue 9/30

12:50 pm-10:18 am

1 stop28h 28m

$686

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Wed 5/7

4:15 pm-11:20 pm

1 stop24h 05m

Porto

Wed 5/14

6:15 am-1:45 pm

1 stop14h 30m

$714

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Mon 9/1

9:40 am-9:35 am

1 stop16h 55m

Porto

Thu 9/11

12:10 pm-4:35 pm

2 stops35h 25m

$743

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Wed 9/17

6:15 am-9:25 am

2 stops20h 10m

Porto

Sat 10/4

6:00 am-11:18 pm

2 stops24h 18m

$760

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Tue 4/29

11:15 am-10:40 am

2 stops16h 25m

Porto

Tue 5/6

11:25 am-11:40 pm

2 stops19h 15m

$830

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Mon 9/15

9:03 am-11:40 am

2 stops19h 37m

Porto

Sat 9/27

8:15 am-10:27 pm

2 stops21h 12m

$845

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Mon 5/19

5:50 pm-11:30 am

1 stop34h 40m

Porto

Mon 6/2

7:20 pm-4:23 pm

2 stops52h 03m

$859

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Wed 4/23

6:35 pm-10:25 am

1 stop32h 50m

Porto

Thu 5/15

7:30 pm-4:25 pm

1 stop27h 55m

$872

DenverPorto

DEN - OPO

DENOPO

Denver Intl

Mon 4/21

11:30 am-3:30 pm

2 stops21h 00m

Porto

Mon 4/28

6:35 am-11:40 pm

2 stops24h 05m

$886

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/30

Showing 1-10 of 17 results
1
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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 $1,081). 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 April 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 April 1, 2025.
See what other customers who have flown with Delta, KLM and SWISS 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
7,899 reviews

Boarding

8.2

Food

7.3

Overall

8.0

Crew

8.5

Comfort

8.0

Entertainment

7.9

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
7,899 reviews
Delta
8.0
Very good
7,899 reviews

Boarding

8.2

Food

7.3

Overall

8.0

Crew

8.5

Comfort

8.0

Entertainment

7.9

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.
KLM
7.8
Good
1,321 reviews
Delta
8.0
Very good
7,899 reviews

Boarding

8.2

Food

7.3

Overall

8.0

Crew

8.5

Comfort

8.0

Entertainment

7.9

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
1,572 reviews
Delta
8.0
Very good
7,899 reviews

Boarding

8.2

Food

7.3

Overall

8.0

Crew

8.5

Comfort

8.0

Entertainment

7.9

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
8,615 reviews
Delta
8.0
Very good
7,899 reviews

Boarding

8.2

Food

7.3

Overall

8.0

Crew

8.5

Comfort

8.0

Entertainment

7.9

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
3,748 reviews
Delta
8.0
Very good
7,899 reviews

Boarding

8.2

Food

7.3

Overall

8.0

Crew

8.5

Comfort

8.0

Entertainment

7.9

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?

    $564 is the cheapest one-way deal found within the past few days, from United Airlines. You may also be able to find cheap deals on Air Canada and Delta, with prices starting from $613 and $630, 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 $1,081). 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 April 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$516Average$977FlexibilityNo cancel feeOn-time75%
Turkish AirlinesCheapest$574Average$658FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$662Average$967FlexibilityNo cancel feeOn-time76%
DeltaCheapest$692Average$1,163FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$738Average$1,184FlexibilityNo cancel feeOn-time69%

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