$531 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 9/21. 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

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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Flights 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

Thu, Dec 4 - Mon, Dec 8
American Airlines Logo
10:55 am - 11:34 pmLIS-STL
18h 39m2 stops
American Airlines Logo
6:29 pm - 2:55 pmSTL-LIS
14h 26m2 stops
$786American Airlines
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Thu, Dec 4 - Mon, Dec 8
American Airlines Logo
10:55 am - 8:19 amLIS-STL
27h 24m2 stops
American Airlines Logo
6:29 pm - 2:55 pmSTL-LIS
14h 26m2 stops
$791American Airlines
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Thu, Dec 4 - Mon, Dec 8
American Airlines Logo
10:55 am - 7:04 pmLIS-STL
14h 09m2 stops
American Airlines Logo
4:39 pm - 6:55 pmSTL-LIS
20h 16m2 stops
$794American Airlines
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Thu, Dec 4 - Mon, Dec 8
American Airlines Logo
10:55 am - 9:47 pmLIS-STL
16h 52m2 stops
American Airlines Logo
2:44 pm - 9:05 amSTL-LIS
12h 21m1 stop
$799American Airlines
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Thu, Dec 4 - Mon, Dec 8
Lufthansa Logo
11:55 am - 7:13 pmLIS-STL
13h 18m1 stop
Lufthansa Logo
11:50 am - 8:10 amSTL-LIS
14h 20m1 stop
$845Lufthansa
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Thu, Dec 4 - Mon, Dec 8
Lufthansa Logo
11:55 am - 7:13 pmLIS-STL
13h 18m1 stop
Lufthansa Logo
11:50 am - 8:10 amSTL-LIS
14h 20m1 stop
$850Lufthansa
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Sat, Aug 16 - Sat, Aug 23
Delta Logo
5:00 am - 9:55 pmLIS-STL
22h 55m2 stops
Delta Logo
6:40 am - 8:00 amSTL-LIS
19h 20m2 stops
$1,193Delta
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Fri, Aug 15 - Sat, Aug 23
Delta Logo
5:40 am - 11:22 pmLIS-STL
23h 42m2 stops
Delta Logo
6:40 am - 8:00 amSTL-LIS
19h 20m2 stops
$1,199Delta
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Fri, Aug 15 - Sat, Aug 23
United Airlines Logo
12:20 pm - 10:45 pmLIS-STL
16h 25m2 stops
United Airlines Logo
8:15 am - 10:35 amSTL-LIS
20h 20m1 stop
$1,210United Airlines
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Fri, Aug 15 - Tue, Aug 19
Air France Logo
9:20 am - 11:22 pmOPO-STL
20h 02m2 stops
Air France Logo
5:11 pm - 3:30 pmSTL-OPO
16h 19m2 stops
$1,223Air France
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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 16h 01m, and Porto, which takes 34h 55m.

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

There are around 216 direct flights from within Portugal to St. Louis every day. Most flights depart in the morning, with 6:00 am the most common departure time and 52% of flights departing in the morning.

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Good to know

Low seasonDecember
Cheapest flight$531
Best time to beat the crowds with an average 21% drop in price.
Most popular time to fly and prices are also 10% lower on average.
Flight from Lisbon 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 round-trip tickets can be as cheap as $898. On the other hand, the most expensive day to fly is Friday, where round-trip 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 round-trip 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 1,509 direct flights from within Portugal to St. Louis. The most common day for departures is Sunday, with 17% 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.

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)

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