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Cheap flights from St. Louis to Porto from $487

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Porto departing on 1/7. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from St. Louis to Porto

Cheap round-trip flights

These are some of the best round-trip flight deals from St. Louis to Porto that have been recently found on momondo from popular airlines, departing in the coming months.

Cheap one-way flights

Flying one-way? These are some of the best deals recently discovered on momondo for flights from St. Louis to Porto.

Cheap last minute flights

Planning a quick getaway from St. Louis to Porto? These are the last-minute flight deals available now.

Cheap direct flights

If you prefer a non-stop journey, check out our latest direct flight deals to Porto, so you can enjoy a seamless trip without layovers.

Cheap bus & train deals from St. Louis to Porto

Find recent round-trip train or bus tickets from St. Louis to Porto.

All round-trip flight deals to Porto

The cheapest plane tickets to Porto found on KAYAK recently.
3:45 pm - 11:35 amSTL-OPO
13h 50m1 stop
6:00 am - 5:36 pmOPO-STL
17h 36m2 stops
$612Lufthansa
Find Deal
dom., ene. 12 - mar., ene. 28
1:02 pm - 11:35 amSTL-OPO
16h 33m2 stops
6:00 am - 5:36 pmOPO-STL
17h 36m2 stops
$619Lufthansa
Find Deal
dom., ene. 12 - mar., ene. 28
3:45 pm - 11:35 amSTL-OPO
13h 50m1 stop
4:30 pm - 1:55 pmOPO-STL
27h 25m1 stop
$625Lufthansa
Find Deal
dom., ene. 12 - mar., ene. 28
7:30 am - 9:45 amSTL-OPO
20h 15m1 stop
6:00 am - 1:30 pmOPO-STL
13h 30m1 stop
mié., abr. 23 - mié., may. 7
3:45 pm - 8:00 amSTL-OPO
34h 15m3 stops
8:35 am - 1:55 pmOPO-STL
35h 20m2 stops
dom., ene. 12 - mar., ene. 28
8:50 am - 9:45 amSTL-OPO
18h 55m2 stops
6:00 am - 1:30 pmOPO-STL
13h 30m1 stop
$959United Airlines
Find Deal
mié., abr. 23 - mié., may. 7
11:20 am - 9:45 amSTL-OPO
16h 25m2 stops
12:35 pm - 10:27 amOPO-STL
27h 52m2 stops
$963United Airlines
Find Deal
mié., abr. 23 - mié., may. 7
1:27 pm - 11:20 amSTL-OPO
15h 53m2 stops
6:00 am - 1:30 pmOPO-STL
13h 30m1 stop
$1,027Lufthansa
Find Deal
jue., abr. 24 - mié., may. 7
5:27 pm - 3:10 pmSTL-OPO
39h 43m2 stops
12:30 pm - 9:45 pmOPO-STL
39h 15m2 stops
$1,061United Airlines
Find Deal
sáb., ene. 4 - sáb., ene. 11
3:30 pm - 3:45 pmSTL-OPO
18h 15m1 stop
6:00 am - 3:06 pmOPO-STL
39h 06m2 stops
$1,085United Airlines
Find Deal
vie., abr. 11 - dom., abr. 20
5:05 pm - 7:05 amSTL-OPO
32h 00m2 stops
mar., ene. 7
5:20 pm - 8:40 pmSTL-OPO
45h 20m2 stops
vie., feb. 14
8:00 am - 3:15 pmSTL-OPO
25h 15m3 stops
mar., ene. 7
3:45 pm - 11:40 amSTL-OPO
13h 55m1 stop
$519Lufthansa
Find Deal
vie., feb. 14
6:53 pm - 8:40 pmSTL-OPO
43h 47m3 stops
vie., feb. 14

Lufthansa flights from St. Louis to Porto

Our best Lufthansa deals on St. Louis to Porto flight tickets
Lufthansa
Jan 12
STL3:45 pmLambert-St Louis
13h 50m
1 stop
OPO11:35 amPorto
Jan 28
OPO6:00 amPorto
17h 36m
2 stops
STL5:36 pmLambert-St Louis
Lufthansa
Jan 12
STL1:02 pmLambert-St Louis
16h 33m
2 stops
OPO11:35 amPorto
Jan 28
OPO6:00 amPorto
17h 36m
2 stops
STL5:36 pmLambert-St Louis
Lufthansa
Jan 12
STL3:45 pmLambert-St Louis
13h 50m
1 stop
OPO11:35 amPorto
Jan 28
OPO4:30 pmPorto
27h 25m
1 stop
STL1:55 pmLambert-St Louis

United Airlines flights from St. Louis to Porto

Our best United Airlines deals on St. Louis to Porto flight tickets
United Airlines
Apr 23
STL8:50 amLambert-St Louis
18h 55m
2 stops
OPO9:45 amPorto
May 7
OPO6:00 amPorto
13h 30m
1 stop
STL1:30 pmLambert-St Louis
United Airlines
Apr 23
STL11:20 amLambert-St Louis
16h 25m
2 stops
OPO9:45 amPorto
May 7
OPO12:35 pmPorto
27h 52m
2 stops
STL10:27 amLambert-St Louis
United Airlines
Jan 4
STL5:27 pmLambert-St Louis
39h 43m
2 stops
OPO3:10 pmPorto
Jan 11
OPO12:30 pmPorto
39h 15m
2 stops
STL9:45 pmLambert-St Louis

See travel insights to Porto from

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

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

What is the typical price of a round-trip flight between St. Louis and Porto?

What is the cheapest month to fly to Porto?

The month of November is, on average, the cheapest month to fly to Porto from St. Louis, with most prices found around $556. If you aren’t able to travel during the month of November, then book flights to Porto from St. Louis during February instead. Flights to Porto in February, while not as cheap as those in November, still average around $636.

What is the cheapest day to depart on your flight to Porto?

The cheapest day to depart on your flight to Porto is on a Thursday when prices can be found for as low as $752. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Friday because tickets tend to average around $1,465. These prices are subject to change though, so be sure to set up a Price Alert for flights to Porto.

What is the cheapest time of day to depart on your flight to Porto?

In the evening is the cheapest time of day to fly from St. Louis to Porto when you can find flight prices for as low as $0. Flying to Porto in the evening is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $1,147 on average. Flights to Porto from St. Louis in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

When to book flights from St. Louis to Porto

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

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

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

Best Price Found

$487

Fastest flight time

13h 50m

Direct flights

None

Airports in Porto

1 airport
The best one-way flight to Porto from St. Louis in the past 72 hours is $487. The best round-trip flight deal from St. Louis to Porto found on momondo in the last 72 hours is $612.
The fastest flight from St. Louis to Porto takes 13h 50m
There are no direct flights from St. Louis to Porto. Popular non-direct route for this connection is Lambert-St Louis Airport - Porto Airport.
There is 1 airport near Porto: Porto (OPO)

  • How far is Lambert-St Louis to Porto by plane?

    There are 4156.0 mi between Lambert-St Louis and Porto. A reasonable flight in good conditions will take 13h 50m.

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

    Prices for flights from Lambert-St Louis Airport to Porto Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Porto Airport?

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

  • What documentation or ID do you need to fly to Porto Airport?

    The travel and health documents you'll need for your trip to Porto Airport 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 Porto Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from St. Louis to Porto?


Best airlines flying from St. Louis to Porto

Compare and see reviews for airlines that fly from St. Louis to Porto with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $752Free CancellationRating
7.4
9,172 reviews
Search United Airlines flights

Why use momondo?

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

Finding the right flight to Porto from St. Louis is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Porto quick and easy, saving you time and money.

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

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

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from St. Louis to Porto.

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

Price alerts on flights to Porto from St. Louis are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.


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