What is the cheapest airline that flies from Porto to Missouri?

American Airlines and Lufthansa are the most popular carriers operating from Porto to Missouri

When did momondo last update prices for flights from Porto Airport to Missouri?

Prices for flights from Porto Airport to Missouri are refreshed on a daily basis.

How old do you have to be to fly from Porto Airport to Missouri?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Porto Airport to Missouri.

What documentation or ID do you need to fly to Missouri?

The travel and health documents you'll need for your trip to Missouri may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Missouri. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$558 Cheap Flights from Porto to Missouri in 2026

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Find the cheapest flights from Porto to Missouri

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

5:00 am - 9:09 pm

OPO

STL

22h 09m

2 stops

5:36 pm - 3:25 pm

STL

OPO

15h 49m

2 stops

$968Delta

Sat, May 23 - Wed, May 27

5:00 am - 5:16 pm

OPO

STL

18h 16m

2 stops

4:25 pm - 10:30 am

STL

OPO

12h 05m

1 stop

$971Delta

Sat, May 23 - Wed, May 27

12:35 pm - 11:35 pm

OPO

STL

17h 00m

1 stop

12:23 pm - 6:55 am

STL

OPO

12h 32m

1 stop

$986United Airlines

Sat, May 23 - Wed, May 27

6:00 am - 8:09 pm

OPO

STL

20h 09m

2 stops

9:14 am - 11:55 am

STL

OPO

20h 41m

3 stops

$1,757Multiple Airlines

Sat, May 23 - Wed, May 27

8:20 am - 7:25 pm

OPO

STL

17h 05m

2 stops

8:07 pm - 10:25 am

STL

OPO

32h 18m

2 stops

$3,586Multiple Airlines

Tue, Sep 1 - Wed, Sep 30

8:20 am - 7:25 pm

OPO

STL

17h 05m

2 stops

9:35 pm - 7:05 pm

STL

OPO

15h 30m

1 stop

$4,304British Airways

Tue, Sep 1 - Wed, Sep 30

8:55 pm - 7:30 pm

OPO

STL

28h 35m

1 stop

9:35 pm - 7:05 pm

STL

OPO

15h 30m

1 stop

$4,363British Airways

Tue, Sep 1 - Wed, Sep 30

British Airways flights from Porto to Missouri

Our best British Airways deals on Porto to Missouri flight tickets

British Airways

Sep 1

OPO8:20 amPorto

17h 05m

2 stops

STL7:25 pmLambert-St Louis

Sep 30

STL9:35 pmLambert-St Louis

15h 30m

1 stop

OPO7:05 pmPorto

$4,304

British Airways

Sep 1

OPO8:55 pmPorto

28h 35m

1 stop

STL7:30 pmLambert-St Louis

Sep 30

STL9:35 pmLambert-St Louis

15h 30m

1 stop

OPO7:05 pmPorto

$4,363

Delta flights from Porto to Missouri

Our best Delta deals on Porto to Missouri flight tickets

Delta

May 23

OPO5:00 amPorto

22h 09m

2 stops

STL9:09 pmLambert-St Louis

May 27

STL5:36 pmLambert-St Louis

15h 49m

2 stops

OPO3:25 pmPorto

$968

Delta

May 23

OPO5:00 amPorto

18h 16m

2 stops

STL5:16 pmLambert-St Louis

May 27

STL4:25 pmLambert-St Louis

12h 05m

1 stop

OPO10:30 amPorto

$971

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortoSt. Louis

OPO - STL

OPOSTL

Porto

Sat 5/23

5:00 am-9:09 pm

2 stops22h 09m

Lambert-St Louis

Wed 5/27

5:36 pm-3:25 pm

2 stops15h 49m

$968

PortoSt. Louis

OPO - STL

OPOSTL

Porto

Sat 5/23

5:00 am-5:16 pm

2 stops18h 16m

Lambert-St Louis

Wed 5/27

4:25 pm-10:30 am

1 stop12h 05m

$971

Quickest round-trip

PortoSt. Louis

OPO - STL

OPOSTL

Porto

Sat 5/23

12:35 pm-11:35 pm

1 stop17h 00m

Lambert-St Louis

Wed 5/27

12:23 pm-6:55 am

1 stop12h 32m

$986

PortoSt. Louis

OPO - STL

OPOSTL

Porto

Sat 5/23

6:00 am-8:09 pm

2 stops20h 09m

Lambert-St Louis

Wed 5/27

9:14 am-11:55 am

3 stops20h 41m

$1,757

PortoSt. Louis

OPO - STL

OPOSTL

Porto

Tue 9/1

8:20 am-7:25 pm

2 stops17h 05m

Lambert-St Louis

Wed 9/30

8:07 pm-10:25 am

2 stops32h 18m

$3,586

PortoSt. Louis

OPO - STL

OPOSTL

Porto

Tue 9/1

8:20 am-7:25 pm

2 stops17h 05m

Lambert-St Louis

Wed 9/30

9:35 pm-7:05 pm

1 stop15h 30m

$4,304

PortoSt. Louis

OPO - STL

OPOSTL

Porto

Tue 9/1

8:55 pm-7:30 pm

1 stop28h 35m

Lambert-St Louis

Wed 9/30

9:35 pm-7:05 pm

1 stop15h 30m

$4,363

Cheapest one-way

PortoSt. Louis

OPO - STL

OPOSTL

Porto

Tue 8/25

10:30 pm-12:14 am

3 stops31h 44m

$558

PortoSt. Louis

OPO - STL

OPOSTL

Porto

Thu 9/24

8:20 am-6:02 pm

2 stops15h 42m

$600

PortoSt. Louis

OPO - STL

OPOSTL

Porto

Thu 9/24

8:20 am-8:03 pm

2 stops17h 43m

$601

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 17 resultsSorted by cheapest first

How to get the cheapest flight ticket from Porto to Missouri

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Can stopping save me money on Porto to Missouri flights?

You could potentially save up to 31% on your flight if you consider stops on a Porto to Missouri flight.

Cheap Porto to Missouri flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Porto to Missouri

Fastest flight time	18h 54m
Direct flights	None

The fastest flight from Porto to Missouri takes 18h 54m

There are no direct flights from Porto to Missouri. There are no popular flight routes from Porto to Missouri.

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Frequently asked questions about flying from Porto to Missouri

When did momondo last update prices for flights from Porto Airport to Missouri?
Prices for flights from Porto Airport to Missouri are refreshed on a daily basis.
How old do you have to be to fly from Porto Airport to Missouri?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Porto Airport to Missouri.
What documentation or ID do you need to fly to Missouri?
The travel and health documents you'll need for your trip to Missouri may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Missouri. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Why use momondo?

Why should I use momondo to find a flight deal from Porto to Missouri?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Missouri from Porto.

Can I find flights from Porto to Missouri with flexible booking policies on momondo?

All flight searches from Porto to Missouri on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Porto to Missouri?

momondo helps you find the best flight between Porto and Missouri by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Porto to Missouri right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Porto to Missouri flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.