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$608+ 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 7/20. Fares are subject to change and may not be available on all flights or dates of travel.
STL — OPO
Apr 29 — May 61
Tue 4/29
Tue 5/6
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 April 24, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$810
(Air Canada)

One-way from

$608
(United Airlines)

Popular in

July

Cheapest in

February

Average price

$1,074
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 April 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 April 24, 2025.

This Air Canada deal was found by Cheapflights users on 4/23. 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.
Wed 5/71:30 pmSTL - OPO
2 stops15h 50mAir Canada
Wed 5/146:00 amOPO - STL
2 stops19h 58mAir Canada
Deal found 4/23$810
This United Airlines deal was found by Cheapflights users on 4/23. 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.
Mon 9/223:01 pmMCI - OPO
1 stop12h 44mUnited Airlines
Thu 10/212:10 pmOPO - MCI
2 stops26h 59mUnited Airlines
Deal found 4/23$813
This FlightHub deal was found by Cheapflights users on 4/23. 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.
Wed 8/61:30 pmSTL - OPO
2 stops37h 20mScandinavian Airlines
Fri 8/155:55 pmOPO - STL
2 stops35h 44mScandinavian Airlines
Deal found 4/23$900
This Booking.com deal was found by Cheapflights users on 4/23. 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.
Fri 9/193:20 pmSTL - OPO
2 stops36h 15mMultiple Airlines
Sat 9/276:00 amOPO - STL
2 stops19h 39mMultiple Airlines
Deal found 4/23$923
This American Airlines deal was found by Cheapflights users on 4/23. 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 stops21h 34mAmerican Airlines
Deal found 4/23$938
This Delta deal was found by Cheapflights users on 4/23. 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 5/811:10 amMCI - OPO
2 stops22h 20mDelta
Sat 5/176:40 amOPO - MCI
2 stops22h 39mDelta
Deal found 4/23$949
This Gurufare deal was found by Cheapflights users on 4/23. 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 9/195:30 pmSTL - OPO
2 stops23h 15mLufthansa
Sat 9/274:35 pmOPO - STL
1 stop26h 55mLufthansa
Deal found 4/23$1,117
This Gurufare deal was found by Cheapflights users on 4/23. 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 12/55:55 pmSTL - OPO
2 stops19h 20mBritish Airways
Sun 1/48:40 pmOPO - STL
2 stops27h 18mBritish Airways
Deal found 4/23$1,130
This United Airlines deal was found by Cheapflights users on 4/23. 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 8/61:30 pmSTL - OPO
1 stop13h 50mUnited Airlines
Fri 8/1512:35 pmOPO - STL
1 stop14h 30mUnited Airlines
Deal found 4/23$1,198
This Air Canada deal was found by Cheapflights users on 4/23. 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.
Thu 5/83:30 pmMCI - OPO
3 stops17h 30mAir Canada
Sat 5/1710:00 amOPO - MCI
3 stops17h 47mAir Canada
Deal found 4/23$1,740
This Lufthansa deal was found by Cheapflights users on 4/23. 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.
Fri 10/106:00 amMCI - OPO
1 stop21h 45mMultiple Airlines
Sun 10/1910:00 amOPO - MCI
2 stops15h 45mMultiple Airlines
Deal found 4/23$2,505

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 April 24, 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

St. LouisPorto

STL - OPO

STLOPO

Lambert-St Louis

Wed 5/7

1:30 pm-11:20 am

2 stops15h 50m

Porto

Wed 5/14

6:00 am-7:58 pm

2 stops19h 58m

$810

Kansas CityPorto

MCI - OPO

MCIOPO

Kansas City

Mon 9/22

7:30 am-9:35 am

2 stops20h 05m

Porto

Thu 10/2

12:10 pm-9:09 am

2 stops26h 59m

$813

St. LouisPorto

STL - OPO

STLOPO

Lambert-St Louis

Wed 8/6

1:30 pm-8:50 am

2 stops37h 20m

Porto

Fri 8/15

5:55 pm-11:39 pm

2 stops35h 44m

$900

St. LouisPorto

STL - OPO

STLOPO

Lambert-St Louis

Fri 9/19

3:20 pm-9:35 am

2 stops36h 15m

Porto

Sat 9/27

6:00 am-7:39 pm

2 stops19h 39m

$923

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-11:49 pm

2 stops21h 34m

$938

Kansas CityPorto

MCI - OPO

MCIOPO

Kansas City

Thu 5/8

11:10 am-3:30 pm

2 stops22h 20m

Porto

Sat 5/17

6:40 am-11:19 pm

2 stops22h 39m

$949

Kansas CityPorto

MCI - OPO

MCIOPO

Kansas City

Thu 5/8

9:59 am-8:25 am

2 stops16h 26m

Porto

Sat 5/17

6:40 am-11:19 pm

2 stops22h 39m

$950

St. LouisPorto

STL - OPO

STLOPO

Lambert-St Louis

Fri 9/19

5:30 pm-10:45 pm

2 stops23h 15m

Porto

Sat 9/27

4:35 pm-1:30 pm

1 stop26h 55m

$1,117

St. LouisPorto

STL - OPO

STLOPO

Lambert-St Louis

Wed 8/6

1:30 pm-9:20 am

1 stop13h 50m

Porto

Fri 8/15

12:35 pm-9:05 pm

1 stop14h 30m

$1,198

Kansas CityPorto

MCI - OPO

MCIOPO

Kansas City

Thu 5/8

3:30 pm-3:00 pm

3 stops17h 30m

Porto

Sat 5/17

9:00 am-9:47 pm

3 stops18h 47m

$1,740

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/23

Showing 1-10 of 15 results
1
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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 $1,081). 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 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 April 24, 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 April 24, 2025.
Read through reviews of airlines operating flights from Missouri to Porto, such as Delta, United Airlines and Scandinavian 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.
Delta
8.0
Very good
7,920 reviews

Comfort

7.9

Food

7.3

Boarding

8.2

Crew

8.5

Overall

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
7,920 reviews
Delta
8.0
Very good
7,920 reviews

Comfort

7.9

Food

7.3

Boarding

8.2

Crew

8.5

Overall

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
8,685 reviews
Delta
8.0
Very good
7,920 reviews

Comfort

7.9

Food

7.3

Boarding

8.2

Crew

8.5

Overall

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.
Scandinavian Airlines
7.3
Good
1,344 reviews
Delta
8.0
Very good
7,920 reviews

Comfort

7.9

Food

7.3

Boarding

8.2

Crew

8.5

Overall

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.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,920 reviews

Comfort

7.9

Food

7.3

Boarding

8.2

Crew

8.5

Overall

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.
Air Canada
7.0
Good
9,192 reviews
Delta
8.0
Very good
7,920 reviews

Comfort

7.9

Food

7.3

Boarding

8.2

Crew

8.5

Overall

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 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 United Airlines, which is currently one of the cheapest options available, starting at $608. Air Canada flights start at $904 while deals on Lufthansa start at $907 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 $1,081). 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 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 April 24, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$564Average$1,065FlexibilityNo cancel feeOn-time69%
DeltaCheapest$611Average$921FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$612Average$1,277FlexibilityNo cancel feeOn-time76%

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