$543 Find Cheap Flights from Portugal to St. Louis

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to St. Louis departing on 5/20. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to St. Louis

 
These are the airlines KAYAK users have selected most often from within our search results for flights to St. Louis, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results for flights to St. Louis, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$839
Typical prices: $859-$1,010
Lufthansa
Sun 1/18Sat 1/24
LIS - STL • 1 stop
Cheapest one-way
$543
Iberia
Wed 5/20
OPO - STL • 2 stops
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to St. Louis!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Portugal to St. Louis

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Portugal to St. Louis that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Portugal to St. Louis

Sun, Jan 18 - Sat, Jan 24
Lufthansa Logo
5:00 am - 1:55 pm
LIS
-
STL
14h 55m1 stop
Lufthansa Logo
11:22 am - 8:10 am
STL
-
LIS
14h 48m1 stop
$839Lufthansa
Fri, Jan 23 - Tue, Jan 27
Multiple Airlines Logo
5:00 am - 1:55 pm
LIS
-
STL
14h 55m1 stop
Multiple Airlines Logo
4:05 pm - 2:35 pm
STL
-
LIS
16h 30m2 stops
$856Multiple Airlines
Thu, Jan 22 - Mon, Jan 26
United Airlines Logo
6:00 am - 10:58 pm
OPO
-
STL
22h 58m2 stops
United Airlines Logo
11:20 am - 2:55 pm
STL
-
OPO
21h 35m2 stops
$859United Airlines
Thu, Jan 22 - Mon, Jan 26
United Airlines Logo
6:00 am - 9:13 pm
OPO
-
STL
21h 13m2 stops
United Airlines Logo
11:20 am - 11:40 am
STL
-
OPO
18h 20m2 stops
$860United Airlines
Sun, Jan 18 - Sat, Jan 24
Lufthansa Logo
5:00 am - 1:55 pm
LIS
-
STL
14h 55m1 stop
Lufthansa Logo
11:22 am - 1:20 pm
STL
-
LIS
19h 58m2 stops
$861Lufthansa
Fri, Jan 23 - Tue, Jan 27
Lufthansa Logo
5:00 am - 11:59 pm
LIS
-
STL
24h 59m2 stops
Lufthansa Logo
6:40 pm - 7:55 pm
STL
-
LIS
19h 15m2 stops
$866Lufthansa
Thu, Jan 15 - Mon, Jan 19
Air Canada Logo
5:00 am - 3:29 pm
LIS
-
STL
40h 29m2 stops
Air Canada Logo
6:40 pm - 9:20 am
STL
-
LIS
32h 40m2 stops
$867Air Canada
Thu, Jan 15 - Mon, Jan 19
Air Canada Logo
5:00 am - 3:29 pm
LIS
-
STL
40h 29m2 stops
Air Canada Logo
4:05 pm - 9:20 am
STL
-
LIS
11h 15m1 stop
$870Air Canada
Thu, Jan 15 - Mon, Jan 19
American Airlines Logo
10:55 am - 11:12 pm
LIS
-
STL
18h 17m2 stops
American Airlines Logo
2:54 pm - 12:05 pm
STL
-
LIS
15h 11m2 stops
$876American Airlines
Tue, Jan 13 - Tue, Jan 20
Delta Logo
5:00 am - 11:25 pm
LIS
-
STL
24h 25m2 stops
Delta Logo
10:19 am - 11:20 am
STL
-
LIS
19h 01m2 stops
$879Delta
Booking Insights

KAYAK's insights & trends for flights to St. Louis

Get data-powered insights and trends for flights to St. Louis to help you find the cheapest flights, the best time to fly and much more.

How long is the flight to St. Louis?

The duration of your flight to St. Louis depends on your departure and arrival airports. Obviously any flights that include a layover will also be longer. The most popular routes to St. Louis on KAYAK are from Lisbon, which takes 14h 25m, and Porto, which takes 21h 13m.

How many direct flights to St. Louis are there each day?

There are around 343 direct flights from within Portugal to St. Louis every day. Most flights depart in the morning, with 7:00 am the most common departure time and 45% of flights departing in the morning.

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Good to know

Low seasonDecember
Cheapest flight$543
Best time to beat the crowds with an average 18% drop in price.
Most popular time to fly and prices are also 5% lower on average.
Flight from Porto to St. Louis

FAQs - booking St. Louis flights

  • How far is Lambert-St Louis Airport from central St. Louis?

    You’ll need to travel 13 miles to reach the St. Louis city center from Lambert-St Louis Airport.

  • What is the name of St. Louis’s airport?

    When flying to St. Louis, you'll arrive at Lambert-St Louis Airport (STL). The airport is also known as Lambert Field, Lambert-St Louis, St. Louis Lambert, or St. Louis Lambert Intl.

  • What is the cheapest day to fly to St. Louis?

    Based on KAYAK data, the cheapest day to fly to St. Louis is Monday where tickets can be as cheap as $898. On the other hand, the most expensive day to fly is Friday, where prices are $1,021 on average.

  • How does KAYAK find such low prices on flights to St. Louis?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights to St. Louis.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket to St. Louis?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights to St. Louis?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to St. Louis with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight to St. Louis?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest time of day to fly to St. Louis?

    The cheapest time of day to fly to St. Louis is generally in the morning, when flights cost $898 on average. The most expensive time of day to fly to St. Louis is generally in the morning, which is peak travel time and where the average cost of a ticket is $898.

  • How many direct flights to St. Louis are there each week?

    Each week there are around 2,396 direct flights from within Portugal to St. Louis. The most common day for departures is Monday, with 16% of flights taking off on this day.

Top tips for finding cheap flights to St. Louis

  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest St. Louis flight deals.

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
O'Fallon
Wentzville
Farmington
Eureka
Litchfield
Grafton
Shrewsbury
Glencoe

Everything you need to know for your flight to St. Louis

Information on the airport you'll fly into in St. Louis

St. Louis (STL)