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$414+ 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 7/14. Fares are subject to change and may not be available on all flights or dates of travel.
STL — OPO
Jul 6 — Jul 131
Sun 7/6
Sun 7/13
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 July 1, 2025.

Round-trip from

$605
(Iberia)

One-way from

$414
(Kiwi.com)

Popular in

July

Cheapest in

February

Average price

$1,282
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 ($253 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($37 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 1, 2025.

This Iberia deal was found by Cheapflights users on 6/30. 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.
Tue 11/410:59 amMCI - OPO
2 stops23h 01mIberia
Fri 11/148:20 amOPO - MCI
2 stops17h 46mIberia
Deal found 6/30$605
This American Airlines deal was found by Cheapflights users on 6/30. 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.
Wed 11/192:29 pmMCI - OPO
2 stops15h 16mAmerican Airlines
Wed 12/38:40 pmOPO - MCI
2 stops18h 07mAmerican Airlines
Deal found 6/30$608
This Lufthansa deal was found by Cheapflights users on 6/30. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/56:35 pmMCI - OPO
2 stops23h 10mLufthansa
Wed 11/126:00 amOPO - MCI
2 stops21h 50mLufthansa
Deal found 6/30$612
This United Airlines deal was found by Cheapflights users on 6/30. 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.
Mon 11/33:25 pmMCI - OPO
2 stops17h 30mUnited Airlines
Thu 11/1312:30 pmOPO - MCI
2 stops26h 26mUnited Airlines
Deal found 6/30$613
This Iberia deal was found by Cheapflights users on 6/30. 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.
Tue 10/2811:46 amSTL - OPO
2 stops14h 54mIberia
Sat 11/812:25 pmOPO - STL
2 stops26h 18mIberia
Deal found 6/30$658
This American Airlines deal was found by Cheapflights users on 7/1. 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.
Tue 10/2810:22 amSTL - OPO
2 stops16h 18mAmerican Airlines
Sat 11/88:40 pmOPO - STL
2 stops18h 12mAmerican Airlines
Deal found 7/1$663
This FlightHub deal was found by Cheapflights users on 6/30. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2811:49 amSTL - OPO
2 stops18h 51mLufthansa
Sat 11/812:40 pmOPO - STL
1 stop31h 15mLufthansa
Deal found 6/30$675
This Delta deal was found by Cheapflights users on 6/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/212:15 pmMCI - OPO
2 stops21h 10mDelta
Sun 11/1611:15 amOPO - MCI
2 stops28h 23mDelta
Deal found 6/30$714
This Delta deal was found by Cheapflights users on 6/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/146:00 pmSTL - OPO
2 stops18h 15mDelta
Thu 8/216:30 amOPO - STL
2 stops22h 53mDelta
Deal found 6/30$866
This KLM deal was found by Cheapflights users on 7/1. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/155:30 pmSTL - OPO
2 stops16h 05mKLM
Fri 8/226:40 amOPO - STL
2 stops22h 34mKLM
Deal found 7/1$897
This Mytrip deal was found by Cheapflights users on 6/30. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/149:15 amSTL - OPO
3 stops25h 00mMultiple Airlines
Thu 8/217:15 amOPO - STL
2 stops18h 45mMultiple Airlines
Deal found 6/30$919
This Air Canada deal was found by Cheapflights users on 6/30. 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.
Thu 8/141:30 pmSTL - OPO
2 stops20h 15mAir Canada
Thu 8/2112:10 pmOPO - STL
1 stop13h 50mAir Canada
Deal found 6/30$925

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 July 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

Tue 11/4

10:59 am-4:00 pm

2 stops23h 01m

Porto

Fri 11/14

8:20 am-8:06 pm

2 stops17h 46m

$605

Kansas CityPorto

MCI - OPO

MCIOPO

Kansas City

Wed 11/19

2:29 pm-11:45 am

2 stops15h 16m

Porto

Wed 12/3

8:40 pm-8:47 am

2 stops18h 07m

$608

Kansas CityPorto

MCI - OPO

MCIOPO

Kansas City

Wed 11/5

6:35 pm-11:45 pm

2 stops23h 10m

Porto

Wed 11/12

6:00 am-9:50 pm

2 stops21h 50m

$612

Kansas CityPorto

MCI - OPO

MCIOPO

Kansas City

Mon 11/3

3:25 pm-2:55 pm

2 stops17h 30m

Porto

Thu 11/13

12:30 pm-8:56 am

2 stops26h 26m

$613

St. LouisPorto

STL - OPO

STLOPO

Lambert-St Louis

Tue 10/28

11:46 am-7:40 am

2 stops14h 54m

Porto

Sat 11/8

12:25 pm-8:43 am

2 stops26h 18m

$658

St. LouisPorto

STL - OPO

STLOPO

Lambert-St Louis

Tue 10/28

10:22 am-7:40 am

2 stops16h 18m

Porto

Sat 11/8

8:40 pm-8:52 am

2 stops18h 12m

$663

St. LouisPorto

STL - OPO

STLOPO

Lambert-St Louis

Tue 10/28

11:49 am-11:40 am

2 stops18h 51m

Porto

Sat 11/8

12:40 pm-1:55 pm

1 stop31h 15m

$675

Kansas CityPorto

MCI - OPO

MCIOPO

Kansas City

Sun 11/2

12:15 pm-3:25 pm

2 stops21h 10m

Porto

Sun 11/16

11:15 am-9:38 am

2 stops28h 23m

$714

St. LouisPorto

STL - OPO

STLOPO

Lambert-St Louis

Thu 8/14

6:00 pm-6:15 pm

2 stops18h 15m

Porto

Thu 8/21

6:30 am-11:23 pm

2 stops22h 53m

$866

St. LouisPorto

STL - OPO

STLOPO

Lambert-St Louis

Fri 8/15

5:30 pm-3:35 pm

2 stops16h 05m

Porto

Fri 8/22

6:40 am-11:14 pm

2 stops22h 34m

$897

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/30

Showing 1-10 of 21 results
1
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 $1,033). 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 July 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.

How much does it cost to fly round-trip from Missouri to Porto?

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 July 1, 2025.
Get a feel of what it's like to fly with Delta, KLM, and Air France from Missouri to Porto by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,973 reviews

Food

7.3

Comfort

7.9

Crew

8.5

Overall

8.0

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,973 reviews
Delta
8.0
Very good
7,973 reviews

Food

7.3

Comfort

7.9

Crew

8.5

Overall

8.0

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,366 reviews
Delta
8.0
Very good
7,973 reviews

Food

7.3

Comfort

7.9

Crew

8.5

Overall

8.0

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Air France
7.5
Good
1,472 reviews
Delta
8.0
Very good
7,973 reviews

Food

7.3

Comfort

7.9

Crew

8.5

Overall

8.0

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,858 reviews
Delta
8.0
Very good
7,973 reviews

Food

7.3

Comfort

7.9

Crew

8.5

Overall

8.0

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,973 reviews

Food

7.3

Comfort

7.9

Crew

8.5

Overall

8.0

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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 $580. Air France flights start at $602 while deals on American Airlines start at $657 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 $1,033). 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

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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 July 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$564Average$837FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$564Average$1,106FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$612Average$1,250FlexibilityNo cancel feeOn-time76%

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