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Cheap flights from Porto to St. Louis from $621

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.
United Airlines Logo
12:30 pm - 3:43 pmOPO  Porto-STL Lambert-St Louis
33h 13m2 stops Frankfurt am Main Chicago O'Hare Intl
United Airlines Logo
5:05 pm - 9:30 amSTL  Lambert-St Louis-OPO Porto
10h 25m1 stop Newark
$1,236United Airlines
Sun, Nov 29 - Thu, Dec 3
Lufthansa Logo
6:00 am - 1:45 pmOPO  Porto-STL Lambert-St Louis
13h 45m1 stop Frankfurt am Main
Lufthansa Logo
11:05 am - 9:30 amSTL  Lambert-St Louis-OPO Porto
16h 25m1 stop Newark
$1,516Lufthansa
Sun, Nov 29 - Thu, Dec 3
United Airlines Logo
6:00 am - 1:45 pmOPO  Porto-STL Lambert-St Louis
13h 45m1 stop Frankfurt am Main
United Airlines Logo
5:05 pm - 9:30 amSTL  Lambert-St Louis-OPO Porto
10h 25m1 stop Newark
$1,531United Airlines
Sun, Nov 29 - Thu, Dec 3
Multiple Airlines Logo
6:00 pm - 11:59 pmOPO  Porto-STL Lambert-St Louis
35h 59m2 stops Lisbon Humberto Delgado Orlando
Multiple Airlines Logo
4:05 pm - 8:10 pmSTL  Lambert-St Louis-OPO Porto
22h 05m3 stops Toronto Pearson Intl Zurich Catania Fontanarossa
$1,874Multiple Airlines
Sun, Nov 29 - Thu, Dec 3
Multiple Airlines Logo
6:15 am - 11:59 pmOPO  Porto-STL Lambert-St Louis
23h 44m3 stops Munich Franz Josef Strauss Toronto Pearson Intl Orlando
Multiple Airlines Logo
5:25 am - 11:50 amSTL  Lambert-St Louis-OPO Porto
24h 25m3 stops Chicago O'Hare Intl Toronto Pearson Intl Ponta Delgada Nordela
$2,279Multiple Airlines
Sun, Nov 29 - Thu, Dec 3
Iberia Logo
8:20 am - 8:29 pmOPO  Porto-STL Lambert-St Louis
18h 09m2 stops Madrid Barajas Chicago O'Hare Intl
Iberia Logo
11:53 am - 11:45 amSTL  Lambert-St Louis-OPO Porto
17h 52m2 stops Chicago O'Hare Intl Madrid Barajas
$3,302Iberia
Wed, Jan 27 - Wed, Feb 10
Lufthansa Logo
12:35 pm - 9:37 pmOPO  Porto-STL Lambert-St Louis
39h 02m2 stops Frankfurt am Main Chicago O'Hare Intl
Lufthansa Logo
3:40 pm - 3:20 pmSTL  Lambert-St Louis-OPO Porto
17h 40m1 stop Frankfurt am Main
$3,557Lufthansa
Wed, Jan 27 - Wed, Feb 10
Air Canada Logo
8:30 am - 11:20 pmOPO  Porto-STL Lambert-St Louis
20h 50m3 stops Lisbon Humberto Delgado Toronto Pearson Intl Chicago O'Hare Intl
Air Canada Logo
4:05 pm - 5:30 pmSTL  Lambert-St Louis-OPO Porto
19h 25m2 stops Toronto Pearson Intl Zurich
$3,936Air Canada
Wed, Jan 27 - Wed, Feb 10

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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
21h 40m
2 stops
STL9:40 pmLambert-St Louis
Nov 16
STL11:29 amLambert-St Louis
16h 01m
1 stop
OPO9:30 amPorto
$1,007
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
$1,009
United Airlines
Nov 12
OPO12:35 pmPorto
15h 17m
1 stop
STL9:52 pmLambert-St Louis
Nov 16
STL9:59 amLambert-St Louis
17h 31m
1 stop
OPO9:30 amPorto
$1,013

Lufthansa flights from Porto to St. Louis

Our best Lufthansa deals on Porto to St. Louis flight tickets
Lufthansa
Nov 29
OPO6:00 amPorto
13h 45m
1 stop
STL1:45 pmLambert-St Louis
Dec 3
STL11:05 amLambert-St Louis
16h 25m
1 stop
OPO9:30 amPorto
$1,516
Lufthansa
Jan 27
OPO12:35 pmPorto
39h 02m
2 stops
STL9:37 pmLambert-St Louis
Feb 10
STL3:40 pmLambert-St Louis
17h 40m
1 stop
OPO3:20 pmPorto
$3,557

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

Sun 11/29

12:30 pm-3:43 pm

2 stops33h 13m

Lambert-St Louis

Thu 12/3

5:05 pm-9:30 am

1 stop10h 25m

$1,236

PortoSt. Louis

OPO Porto - STL Lambert-St Louis

OPOSTL

Porto

Sun 11/29

6:00 am-1:45 pm

1 stop13h 45m

Lambert-St Louis

Thu 12/3

11:05 am-9:30 am

1 stop16h 25m

$1,516
Quickest round-trip

PortoSt. Louis

OPO Porto - STL Lambert-St Louis

OPOSTL

Porto

Sun 11/29

6:00 am-1:45 pm

1 stop13h 45m

Lambert-St Louis

Thu 12/3

5:05 pm-9:30 am

1 stop10h 25m

$1,531

PortoSt. Louis

OPO Porto - STL Lambert-St Louis

OPOSTL

Porto

Sun 11/29

6:00 pm-11:59 pm

2 stops35h 59m

Lambert-St Louis

Thu 12/3

4:05 pm-8:10 pm

3 stops22h 05m

$1,874

PortoSt. Louis

OPO Porto - STL Lambert-St Louis

OPOSTL

Porto

Sun 11/29

6:15 am-11:59 pm

3 stops23h 44m

Lambert-St Louis

Thu 12/3

5:25 am-11:50 am

3 stops24h 25m

$2,279

PortoSt. Louis

OPO Porto - STL Lambert-St Louis

OPOSTL

Porto

Wed 1/27

8:20 am-8:29 pm

2 stops18h 09m

Lambert-St Louis

Wed 2/10

11:53 am-11:45 am

2 stops17h 52m

$3,302

PortoSt. Louis

OPO Porto - STL Lambert-St Louis

OPOSTL

Porto

Wed 1/27

12:35 pm-9:37 pm

2 stops39h 02m

Lambert-St Louis

Wed 2/10

3:40 pm-3:20 pm

1 stop17h 40m

$3,557

PortoSt. Louis

OPO Porto - STL Lambert-St Louis

OPOSTL

Porto

Wed 1/27

8:30 am-11:20 pm

3 stops20h 50m

Lambert-St Louis

Wed 2/10

4:05 pm-5:30 pm

2 stops19h 25m

$3,936
Cheapest one-way

PortoSt. Louis

OPO Porto - STL Lambert-St Louis

OPOSTL

Porto

Tue 12/1

6:10 am-11:10 am

3 stops35h 00m

$621

PortoSt. Louis

OPO Porto - STL Lambert-St Louis

OPOSTL

Porto

Tue 12/1

9:10 am-6:49 pm

2 stops39h 39m

$783

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 11 resultsSorted by cheapest first
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See travel insights to St. Louis from

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 13% 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

$621

Fastest flight time

16h 49m

Direct flights

None
The best one-way flight to St. Louis from Porto in the past 72 hours is $621. The best round-trip flight deal from Porto to St. Louis found on momondo in the last 72 hours is $1,236.
The fastest flight from Porto to St. Louis takes 16h 49m
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 16h 49m.

  • 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
Maryland Heights
St. Peters
Alton
Collinsville
Farmington
Florissant
Festus
Hermann
Clayton
Fenton
Edwardsville
O'Fallon
Eureka
Wentzville
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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