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Cheap flights from Porto to St. Louis from $637

1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Porto to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
8:20 am - 5:47 pmOPO  Porto-STL Lambert-St Louis
39h 27m2 stops Madrid Barajas Boston Logan Intl
American Airlines Logo
5:29 pm - 4:00 pmSTL  Lambert-St Louis-OPO Porto
40h 31m2 stops Chicago O'Hare Intl Madrid Barajas
$879American Airlines
Thu, Nov 12 - Mon, Nov 16
American Airlines Logo
8:20 am - 9:16 amOPO  Porto-STL Lambert-St Louis
30h 56m2 stops Madrid Barajas Boston Logan Intl
American Airlines Logo
1:20 pm - 4:00 pmSTL  Lambert-St Louis-OPO Porto
20h 40m2 stops Chicago O'Hare Intl Madrid Barajas
$880American Airlines
Thu, Nov 12 - Mon, Nov 16
American Airlines Logo
12:25 pm - 5:47 pmOPO  Porto-STL Lambert-St Louis
35h 22m2 stops Madrid Barajas Boston Logan Intl
American Airlines Logo
8:15 pm - 11:45 amSTL  Lambert-St Louis-OPO Porto
33h 30m2 stops Chicago O'Hare Intl Madrid Barajas
$881American Airlines
Thu, Nov 12 - Mon, Nov 16
American Airlines Logo
8:20 am - 5:47 pmOPO  Porto-STL Lambert-St Louis
39h 27m2 stops Madrid Barajas Boston Logan Intl
American Airlines Logo
5:29 pm - 4:00 pmSTL  Lambert-St Louis-OPO Porto
40h 31m2 stops Chicago O'Hare Intl Madrid Barajas
$884American Airlines
Thu, Nov 12 - Mon, Nov 16
United Airlines Logo
6:00 am - 11:24 pmOPO  Porto-STL Lambert-St Louis
23h 24m2 stops Frankfurt am Main Chicago O'Hare Intl
United Airlines Logo
11:29 am - 9:30 amSTL  Lambert-St Louis-OPO Porto
16h 01m1 stop Newark
$962United Airlines
Thu, Nov 12 - Mon, Nov 16
United Airlines Logo
6:00 am - 11:24 pmOPO  Porto-STL Lambert-St Louis
23h 24m2 stops Frankfurt am Main Chicago O'Hare Intl
United Airlines Logo
11:29 am - 9:30 amSTL  Lambert-St Louis-OPO Porto
16h 01m1 stop Newark
$963United Airlines
Thu, Nov 12 - Mon, Nov 16
United Airlines Logo
6:00 am - 11:24 pmOPO  Porto-STL Lambert-St Louis
23h 24m2 stops Frankfurt am Main Chicago O'Hare Intl
United Airlines Logo
11:29 am - 9:30 amSTL  Lambert-St Louis-OPO Porto
16h 01m1 stop Newark
$964United Airlines
Thu, Nov 12 - Mon, Nov 16
United Airlines Logo
6:00 am - 11:24 pmOPO  Porto-STL Lambert-St Louis
23h 24m2 stops Frankfurt am Main Chicago O'Hare Intl
United Airlines Logo
11:29 am - 9:30 amSTL  Lambert-St Louis-OPO Porto
16h 01m1 stop Newark
$967United Airlines
Thu, Nov 12 - Mon, Nov 16
United Airlines Logo
6:00 am - 11:24 pmOPO  Porto-STL Lambert-St Louis
23h 24m2 stops Frankfurt am Main Chicago O'Hare Intl
United Airlines Logo
11:29 am - 9:30 amSTL  Lambert-St Louis-OPO Porto
16h 01m1 stop Newark
$968United Airlines
Thu, Nov 12 - Mon, Nov 16
United Airlines Logo
12:35 pm - 9:52 pmOPO  Porto-STL Lambert-St Louis
15h 17m1 stop Newark
United Airlines Logo
5:00 pm - 9:30 amSTL  Lambert-St Louis-OPO Porto
10h 30m1 stop Newark
$985United Airlines
Thu, Nov 12 - Mon, Nov 16

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American Airlines flights from Porto to St. Louis

Our best American Airlines deals on Porto to St. Louis flight tickets
American Airlines
Nov 12
OPO8:20 amPorto
39h 27m
2 stops
STL5:47 pmLambert-St Louis
Nov 16
STL5:29 pmLambert-St Louis
40h 31m
2 stops
OPO4:00 pmPorto
$879
American Airlines
Nov 12
OPO8:20 amPorto
30h 56m
2 stops
STL9:16 amLambert-St Louis
Nov 16
STL1:20 pmLambert-St Louis
20h 40m
2 stops
OPO4:00 pmPorto
$880
American Airlines
Nov 12
OPO12:25 pmPorto
35h 22m
2 stops
STL5:47 pmLambert-St Louis
Nov 16
STL8:15 pmLambert-St Louis
33h 30m
2 stops
OPO11:45 amPorto
$881

United Airlines flights from Porto to St. Louis

Our best United Airlines deals on Porto to St. Louis flight tickets
United Airlines
Nov 12
OPO6:00 amPorto
23h 24m
2 stops
STL11:24 pmLambert-St Louis
Nov 16
STL11:29 amLambert-St Louis
16h 01m
1 stop
OPO9:30 amPorto
$962
United Airlines
Nov 12
OPO6:00 amPorto
23h 24m
2 stops
STL11:24 pmLambert-St Louis
Nov 16
STL11:29 amLambert-St Louis
16h 01m
1 stop
OPO9:30 amPorto
$963
United Airlines
Nov 12
OPO6:00 amPorto
23h 24m
2 stops
STL11:24 pmLambert-St Louis
Nov 16
STL11:29 amLambert-St Louis
16h 01m
1 stop
OPO9:30 amPorto
$964

momondo Fare Finder

 
Use the filters below to find and compare flights from Porto to St. Louis that are best for you.

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Route

Depart

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Price

Cheapest round-trip

PortoSt. Louis

OPO Porto - STL Lambert-St Louis

OPOSTL

Porto

Thu 11/12

8:20 am-5:47 pm

2 stops39h 27m

Lambert-St Louis

Mon 11/16

5:29 pm-4:00 pm

2 stops40h 31m

$879

PortoSt. Louis

OPO Porto - STL Lambert-St Louis

OPOSTL

Porto

Thu 11/12

8:20 am-9:16 am

2 stops30h 56m

Lambert-St Louis

Mon 11/16

1:20 pm-4:00 pm

2 stops20h 40m

$880

PortoSt. Louis

OPO Porto - STL Lambert-St Louis

OPOSTL

Porto

Thu 11/12

12:25 pm-5:47 pm

2 stops35h 22m

Lambert-St Louis

Mon 11/16

8:15 pm-11:45 am

2 stops33h 30m

$881

PortoSt. Louis

OPO Porto - STL Lambert-St Louis

OPOSTL

Porto

Thu 11/12

8:20 am-5:47 pm

2 stops39h 27m

Lambert-St Louis

Mon 11/16

5:29 pm-4:00 pm

2 stops40h 31m

$884

PortoSt. Louis

OPO Porto - STL Lambert-St Louis

OPOSTL

Porto

Thu 11/12

6:00 am-11:24 pm

2 stops23h 24m

Lambert-St Louis

Mon 11/16

11:29 am-9:30 am

1 stop16h 01m

$962

PortoSt. Louis

OPO Porto - STL Lambert-St Louis

OPOSTL

Porto

Thu 11/12

6:00 am-11:24 pm

2 stops23h 24m

Lambert-St Louis

Mon 11/16

11:29 am-9:30 am

1 stop16h 01m

$963

PortoSt. Louis

OPO Porto - STL Lambert-St Louis

OPOSTL

Porto

Thu 11/12

6:00 am-11:24 pm

2 stops23h 24m

Lambert-St Louis

Mon 11/16

11:29 am-9:30 am

1 stop16h 01m

$964

PortoSt. Louis

OPO Porto - STL Lambert-St Louis

OPOSTL

Porto

Thu 11/12

6:00 am-11:24 pm

2 stops23h 24m

Lambert-St Louis

Mon 11/16

11:29 am-9:30 am

1 stop16h 01m

$967

PortoSt. Louis

OPO Porto - STL Lambert-St Louis

OPOSTL

Porto

Thu 11/12

6:00 am-11:24 pm

2 stops23h 24m

Lambert-St Louis

Mon 11/16

11:29 am-9:30 am

1 stop16h 01m

$968
Quickest round-trip

PortoSt. Louis

OPO Porto - STL Lambert-St Louis

OPOSTL

Porto

Thu 11/12

12:35 pm-9:52 pm

1 stop15h 17m

Lambert-St Louis

Mon 11/16

5:00 pm-9:30 am

1 stop10h 30m

$985

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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

Can stopping save me money on Porto to St. Louis flights?

You could potentially save up to 41% 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

$637

Fastest flight time

23h 01m

Direct flights

None
The best one-way flight to St. Louis from Porto in the past 72 hours is $637. The best round-trip flight deal from Porto to St. Louis found on momondo in the last 72 hours is $879.
The fastest flight from Porto to St. Louis takes 23h 01m
There are no direct flights from Porto to St. Louis. There are no popular flight routes from Porto to St. Louis.
Search flight deals

Frequently asked questions about flying from Porto to St. Louis

  • 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 23h 01m.

  • 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.

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Fairview Heights
St. Peters
Maryland Heights
Alton
Collinsville
Florissant
Hermann
Clayton
O'Fallon
Farmington
Fenton
Festus
Edwardsville
Wentzville
Eureka
Litchfield
Grafton
Waterloo

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.

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