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$450+ Cheap flights from Missouri 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 8/15. Fares are subject to change and may not be available on all flights or dates of travel.
STL — OPO
May 6 — May 131
Tue 5/6
Tue 5/13
1 adult, Economy
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Cheap flight deals from Missouri to Porto

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

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$762
(United Airlines)

One-way from

$450
(Kiwi.com)

Popular in

July

Cheapest in

February

Average price

$1,065
Provider with most accurate pricing for Kansas City-Porto flight deals.
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Provider most trusted by Cheapflights users for Kansas City-Porto flights.
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From Missouri to Porto
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One-way flight from Missouri to Porto
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Highest demand for flights based on searches. 22% potential increase in price ($277 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($32 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 Missouri to Porto

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

This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/54:19 pmMCI - OPO
1 stop11h 11mUnited Airlines
Wed 11/1212:35 pmOPO - MCI
1 stop15h 52mUnited Airlines
Deal found 4/30$592
This Iberia 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/122:07 pmMCI - OPO
2 stops15h 38mIberia
Wed 11/198:40 pmOPO - MCI
2 stops18h 08mIberia
Deal found 4/30$605
This United 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2910:00 amMCI - OPO
2 stops18h 30mMultiple Airlines
Wed 11/56:00 amOPO - MCI
2 stops19h 31mMultiple Airlines
Deal found 4/30$606
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/191:22 pmSTL - OPO
2 stops16h 18mAmerican Airlines
Sat 9/278:15 amOPO - STL
2 stops18h 08mAmerican Airlines
Deal found 4/30$837
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/191:50 pmMCI - OPO
2 stops15h 50mAmerican Airlines
Sun 8/2412:20 pmOPO - MCI
2 stops18h 09mAmerican Airlines
Deal found 4/30$838
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/275:11 pmSTL - OPO
2 stops34h 34mUnited Airlines
Sun 10/1212:10 pmOPO - STL
2 stops32h 09mUnited Airlines
Deal found 4/30$846
This Gurufare 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/106:32 pmMCI - OPO
2 stops22h 48mLufthansa
Sun 10/1911:05 amOPO - MCI
2 stops40h 37mLufthansa
Deal found 4/30$912
This Expedia deal was found by Cheapflights users on 4/29. 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.
Sat 9/271:30 pmSTL - OPO
1 stop14h 05mMultiple Airlines
Sun 10/126:15 amOPO - STL
2 stops39h 23mMultiple Airlines
Deal found 4/29$931
This Air Canada 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/54:00 pmSTL - OPO
2 stops35h 20mAir Canada
Tue 8/1212:50 pmOPO - STL
2 stops29h 37mAir Canada
Deal found 4/30$966
This KAYAK 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/284:59 pmMCI - OPO
2 stops32h 36mBritish Airways
Sun 8/38:15 amOPO - MCI
2 stops18h 26mBritish Airways
Deal found 4/30$1,080
This Gurufare 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/193:30 pmSTL - OPO
1 stop25h 15mLufthansa
Sat 9/276:00 amOPO - STL
2 stops19h 39mLufthansa
Deal found 4/30$1,199
This Air Canada 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/2810:00 amMCI - OPO
3 stops17h 35mAir Canada
Sun 8/311:20 amOPO - MCI
3 stops17h 54mAir Canada
Deal found 4/30$1,290

Cheapflights Fare Finder

Customize your flight search to find flights from Missouri 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 May 1, 2025.
Use the filters below to find and compare flights from Missouri to Porto that are best for you.

Fly from

Missouri

Fly to

Porto

Route

Depart

Return

Price

Kansas CityPorto

MCI - OPO

MCIOPO

Kansas City

Mon 9/22

3:01 pm-9:45 am

1 stop12h 44m

Porto

Thu 10/2

12:10 pm-9:09 am

2 stops26h 59m

$762

St. LouisPorto

STL - OPO

STLOPO

Lambert-St Louis

Fri 9/19

1:22 pm-11:40 am

2 stops16h 18m

Porto

Sat 9/27

8:15 am-8:23 pm

2 stops18h 08m

$837

Kansas CityPorto

MCI - OPO

MCIOPO

Kansas City

Tue 8/19

1:50 pm-11:40 am

2 stops15h 50m

Porto

Sun 8/24

12:20 pm-12:29 am

2 stops18h 09m

$838

St. LouisPorto

STL - OPO

STLOPO

Lambert-St Louis

Sat 9/27

5:11 pm-9:45 am

2 stops34h 34m

Porto

Sun 10/12

12:10 pm-2:19 pm

2 stops32h 09m

$846

Kansas CityPorto

MCI - OPO

MCIOPO

Kansas City

Fri 10/10

6:32 pm-11:20 pm

2 stops22h 48m

Porto

Sun 10/19

11:05 am-9:42 pm

2 stops40h 37m

$912

St. LouisPorto

STL - OPO

STLOPO

Lambert-St Louis

Sat 9/27

1:30 pm-9:35 am

1 stop14h 05m

Porto

Sun 10/12

6:15 am-3:38 pm

2 stops39h 23m

$931

Kansas CityPorto

MCI - OPO

MCIOPO

Kansas City

Sun 8/24

6:18 pm-3:55 pm

2 stops15h 37m

Porto

Mon 9/1

8:35 pm-8:36 pm

2 stops30h 01m

$962

St. LouisPorto

STL - OPO

STLOPO

Lambert-St Louis

Tue 8/5

4:00 pm-9:20 am

2 stops35h 20m

Porto

Tue 8/12

12:50 pm-12:27 pm

2 stops29h 37m

$966

Kansas CityPorto

MCI - OPO

MCIOPO

Kansas City

Mon 7/28

4:59 pm-7:35 am

2 stops32h 36m

Porto

Sun 8/3

8:15 am-8:41 pm

2 stops18h 26m

$1,080

Kansas CityPorto

MCI - OPO

MCIOPO

Kansas City

Tue 8/19

6:29 pm-9:20 am

2 stops32h 51m

Porto

Sun 8/24

11:20 am-9:09 am

3 stops27h 49m

$1,083

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

Showing 1-10 of 21 results
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2
3

Best time to book a flight from Missouri to Porto

Have a flexible travel schedule? Discover the best time to fly to Porto from Missouri 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 Missouri to Porto

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

Currently, January is the cheapest month in which you can book a flight from Missouri to Porto (average of $523). Flying from Missouri 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 MO to OPO?

Find hourly flight availability from Missouri 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 May 1, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Missouri 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 May 1, 2025.
Read through reviews of airlines operating flights from Missouri to Porto, such as Air France, United Airlines and American Airlines. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Air France
7.4
Good
1,446 reviews

Boarding

7.4

Comfort

7.4

Food

7.0

Entertainment

7.0

Crew

8.2

Overall

7.4

Reviews

1 / 20
8.0
Excellent

Florian,Feb 2025

YUL - CDG

Always a pleasure to travel with Air France. It might not be up to airline like Qatar or Singapour Airlines but I always find it reassuring flying with Air France.
Air France
7.4
Good
1,446 reviews
Air France
7.4
Good
1,446 reviews

Boarding

7.4

Comfort

7.4

Food

7.0

Entertainment

7.0

Crew

8.2

Overall

7.4

Reviews

1 / 20
8.0
Excellent

Florian,Feb 2025

YUL - CDG

Always a pleasure to travel with Air France. It might not be up to airline like Qatar or Singapour Airlines but I always find it reassuring flying with Air France.
United Airlines
7.4
Good
8,696 reviews
Air France
7.4
Good
1,446 reviews

Boarding

7.4

Comfort

7.4

Food

7.0

Entertainment

7.0

Crew

8.2

Overall

7.4

Reviews

1 / 20
8.0
Excellent

Florian,Feb 2025

YUL - CDG

Always a pleasure to travel with Air France. It might not be up to airline like Qatar or Singapour Airlines but I always find it reassuring flying with Air France.
American Airlines
7.2
Good
10,000 reviews
Air France
7.4
Good
1,446 reviews

Boarding

7.4

Comfort

7.4

Food

7.0

Entertainment

7.0

Crew

8.2

Overall

7.4

Reviews

1 / 20
8.0
Excellent

Florian,Feb 2025

YUL - CDG

Always a pleasure to travel with Air France. It might not be up to airline like Qatar or Singapour Airlines but I always find it reassuring flying with Air France.
Air Canada
7.0
Good
9,252 reviews
Air France
7.4
Good
1,446 reviews

Boarding

7.4

Comfort

7.4

Food

7.0

Entertainment

7.0

Crew

8.2

Overall

7.4

Reviews

1 / 20
8.0
Excellent

Florian,Feb 2025

YUL - CDG

Always a pleasure to travel with Air France. It might not be up to airline like Qatar or Singapour Airlines but I always find it reassuring flying with Air France.
Iberia
7.0
Good
2,701 reviews
Air France
7.4
Good
1,446 reviews

Boarding

7.4

Comfort

7.4

Food

7.0

Entertainment

7.0

Crew

8.2

Overall

7.4

Reviews

1 / 20
8.0
Excellent

Florian,Feb 2025

YUL - CDG

Always a pleasure to travel with Air France. It might not be up to airline like Qatar or Singapour Airlines but I always find it reassuring flying with Air France.

Related info for your journey

Find useful and relevant information for your journey from Missouri 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 Missouri?

    Located just 6.8 mi from the city center, Porto (OPO) is the airport most travelers will use when flying to Porto from Missouri.

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

    To fly one-way, consider booking your trip with American Airlines, which is currently one of the cheapest options available, starting at $571. United Airlines flights start at $583 while deals on Lufthansa start at $664 one-way.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Missouri 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 Missouri to Porto?

    Currently, January is the cheapest month in which you can book a flight from Missouri to Porto (average of $523). Flying from Missouri 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 Missouri?

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

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Alternative routes for Missouri to Porto

See prices for flight routes from nearby airports that may be better suited for you.
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Top 3 airlines flying from Missouri to Porto

Discover the top 3 airlines that operate flights from Missouri 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 May 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$564Average$1,107FlexibilityNo cancel feeOn-time69%
DeltaCheapest$611Average$870FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$612Average$1,250FlexibilityNo cancel feeOn-time76%

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