What is the cheapest airline that flies from Porto to Lambert-St Louis?

Lufthansa is the most popular carrier operating from Porto to Lambert-St Louis

When did momondo last update prices for flights from Porto Airport to Lambert-St Louis Airport?

Prices for flights from Porto Airport to Lambert-St Louis Airport refresh daily.

How old do you have to be to fly from Porto Airport to Lambert-St Louis Airport?

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 Lambert-St Louis Airport.

What documentation or ID do you need to fly to Lambert-St Louis Airport?

The necessary travel and health documents for your Lambert-St Louis Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$602 Cheap Flights from Porto to St. Louis in 2025

1 adult

0 bags

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from Porto to St. Louis

Round-trip

One-way

Cheap round-trip flights

9:20 am - 11:22 pmOPO-STL

20h 02m2 stops

5:11 pm - 3:30 pmSTL-OPO

16h 19m2 stops

$1,223Air France

Find Deal

Fri, Aug 15 - Tue, Aug 19

9:00 am - 11:35 pmOPO-STL

20h 35m1 stop

11:27 am - 7:45 amSTL-OPO

14h 18m1 stop

$1,373Lufthansa

Find Deal

Fri, Aug 15 - Tue, Aug 19

9:00 am - 11:35 pmOPO-STL

20h 35m1 stop

12:35 pm - 11:15 amSTL-OPO

16h 40m2 stops

$1,380Lufthansa

Find Deal

Fri, Aug 15 - Tue, Aug 19

7:10 am - 8:00 pmOPO-STL

18h 50m2 stops

1:30 pm - 8:25 pmSTL-OPO

24h 55m3 stops

$1,537

Find Deal

Fri, Aug 15 - Tue, Aug 19

12:35 pm - 3:21 pmOPO-STL

32h 46m3 stops

1:30 pm - 2:20 pmSTL-OPO

18h 50m3 stops

$1,676

Find Deal

Fri, Aug 15 - Tue, Aug 19

Lufthansa flights from Porto to St. Louis

Our best Lufthansa deals on Porto to St. Louis flight tickets

Lufthansa

Aug 15

OPO9:00 amPorto

20h 35m

1 stop

STL11:35 pmLambert-St Louis

Aug 19

STL11:27 amLambert-St Louis

14h 18m

1 stop

OPO7:45 amPorto

$1,373

Find similar

Lufthansa

Aug 15

OPO9:00 amPorto

20h 35m

1 stop

STL11:35 pmLambert-St Louis

Aug 19

STL12:35 pmLambert-St Louis

16h 40m

2 stops

OPO11:15 amPorto

$1,380

Find similar

Fly from

Fly to

Route

Depart

Return

Price

PortoSt. Louis

OPO - STL

OPOSTL

Porto

Fri 8/15

9:20 am-11:22 pm

2 stops20h 02m

Lambert-St Louis

Tue 8/19

5:11 pm-3:30 pm

2 stops16h 19m

$1,223

PortoSt. Louis

OPO - STL

OPOSTL

Porto

Fri 8/15

9:00 am-11:35 pm

1 stop20h 35m

Lambert-St Louis

Tue 8/19

11:27 am-7:45 am

1 stop14h 18m

$1,373

PortoSt. Louis

OPO - STL

OPOSTL

Porto

Fri 8/15

9:00 am-11:35 pm

1 stop20h 35m

Lambert-St Louis

Tue 8/19

12:35 pm-11:15 am

2 stops16h 40m

$1,380

PortoSt. Louis

OPO - STL

OPOSTL

Porto

Fri 8/15

7:10 am-8:00 pm

2 stops18h 50m

Lambert-St Louis

Tue 8/19

1:30 pm-8:25 pm

3 stops24h 55m

$1,537

PortoSt. Louis

OPO - STL

OPOSTL

Porto

Fri 8/15

12:35 pm-3:21 pm

3 stops32h 46m

Lambert-St Louis

Tue 8/19

1:30 pm-2:20 pm

3 stops18h 50m

$1,676

PortoSt. Louis

OPO - STL

OPOSTL

Porto

Sun 10/19

6:05 pm-9:07 am

2 stops45h 02m

$602

PortoSt. Louis

OPO - STL

OPOSTL

Porto

Sun 10/19

10:30 pm-1:22 pm

3 stops44h 52m

$673

PortoSt. Louis

OPO - STL

OPOSTL

Porto

Wed 10/29

6:00 am-2:55 pm

1 stop13h 55m

$704

PortoSt. Louis

OPO - STL

OPOSTL

Porto

Wed 10/29

6:00 am-5:39 pm

2 stops16h 39m

$710

PortoSt. Louis

OPO - STL

OPOSTL

Porto

Wed 10/29

6:00 am-10:45 pm

2 stops21h 45m

$711

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 11 resultsSorted by cheapest first

How to get the cheapest flight ticket from Porto to St. Louis

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 St. Louis flights?

You could potentially save up to 18% on your flight if you consider stops on a Porto to St. Louis flight.

When to book flights from Porto to St. Louis

Are you open to changing your travel dates? Check out the ideal times to fly from Porto to St. Louis according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Porto to St. Louis (OPO to STL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Porto to St. Louis

Best Price Found	$602
Fastest flight time	13h 55m
Direct flights	None
Airports in St. Louis	1 airport

The best one-way flight to St. Louis from Porto in the past 72 hours is $602. The best round-trip flight deal from Porto to St. Louis found on momondo in the last 72 hours is $1,223.

The fastest flight from Porto to St. Louis takes 13h 55m

There are no direct flights from Porto to St. Louis. Popular non-direct route for this connection is Porto Airport - Lambert-St Louis Airport.

There is 1 airport near St. Louis: Lambert-St Louis (STL)

Search flight deals

How far is Porto to Lambert-St Louis by plane?
There are 4156.0 mi between Porto and Lambert-St Louis. A reasonable flight in good conditions will take 18h 50m.
When did momondo last update prices for flights from Porto Airport to Lambert-St Louis Airport?
Prices for flights from Porto Airport to Lambert-St Louis Airport refresh daily.
How old do you have to be to fly from Porto Airport to Lambert-St Louis Airport?
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 Lambert-St Louis Airport.
What documentation or ID do you need to fly to Lambert-St Louis Airport?
The necessary travel and health documents for your Lambert-St Louis Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

St. Charles

Chesterfield

Hermann

Fairview Heights

Maryland Heights

Florissant

Fenton

Collinsville

O'Fallon

Alton

St. Peters

Farmington

Wentzville

Festus

Glencoe

Eureka

Edwardsville

Clayton

Shrewsbury

Grafton

Why use momondo?

Why should I use momondo to find a flight deal from Porto to St. Louis?

It is quick and easy to find Porto to St. Louis flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to St. Louis that suits you.

Can I find flights from Porto to St. Louis with flexible booking policies on momondo?

Yes. All flights to St. Louis from Porto on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Porto to St. Louis?

momondo helps you find the best flight between Porto and St. Louis 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 St. Louis right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Porto to St. Louis flights. All you need is a valid email address and we will do the rest; it is that quick and easy.