$594 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 9/24. 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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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

Tue, Sep 1 - Mon, Sep 7
Lufthansa Logo
12:05 pm - 11:00 pm
OPO
-
STL
16h 55m
2 stops
Lufthansa Logo
12:30 pm - 9:45 am
STL
-
OPO
15h 15m
1 stop
$958Lufthansa
Tue, Sep 1 - Mon, Sep 7
Lufthansa Logo
12:05 pm - 11:00 pm
OPO
-
STL
16h 55m
2 stops
Lufthansa Logo
12:30 pm - 6:55 am
STL
-
OPO
12h 25m
1 stop
$959Lufthansa
Tue, Sep 1 - Mon, Sep 7
Lufthansa Logo
12:05 pm - 11:00 pm
OPO
-
STL
16h 55m
2 stops
Lufthansa Logo
12:30 pm - 6:55 am
STL
-
OPO
12h 25m
1 stop
$960Lufthansa
Fri, May 22 - Tue, May 26
United Airlines Logo
5:05 am - 1:25 pm
LIS
-
STL
14h 20m
1 stop
United Airlines Logo
1:13 pm - 8:20 am
STL
-
LIS
13h 07m
2 stops
$962United Airlines
Tue, Sep 1 - Mon, Sep 7
Lufthansa Logo
4:35 pm - 1:25 pm
OPO
-
STL
26h 50m
1 stop
Lufthansa Logo
3:30 pm - 10:50 pm
STL
-
OPO
25h 20m
1 stop
$963Lufthansa
Fri, May 22 - Tue, May 26
Delta Logo
5:35 am - 4:46 pm
LIS
-
STL
17h 11m
2 stops
Delta Logo
5:36 pm - 2:55 pm
STL
-
LIS
15h 19m
2 stops
$980Delta
Tue, Sep 1 - Mon, Sep 7
Iberia Logo
12:25 pm - 11:42 pm
OPO
-
STL
17h 17m
2 stops
Iberia Logo
3:35 pm - 4:00 pm
STL
-
OPO
18h 25m
2 stops
$998Iberia
Thu, Jun 11 - Thu, Jun 18
Iberia Logo
11:05 am - 11:59 pm
LIS
-
STL
18h 54m
1 stop
Iberia Logo
8:14 pm - 11:50 am
STL
-
LIS
33h 36m
2 stops
$1,028Iberia
Fri, May 22 - Tue, May 26
Multiple Airlines Logo
7:00 am - 8:09 pm
LIS
-
STL
43h 09m
3 stops
Multiple Airlines Logo
1:05 pm - 9:45 pm
STL
-
LIS
26h 40m
2 stops
$1,073Multiple Airlines
Thu, Jun 11 - Thu, Jun 18
Multiple Airlines Logo
7:25 am - 1:25 pm
LIS
-
STL
36h 00m
1 stop
Multiple Airlines Logo
2:15 pm - 11:05 am
STL
-
LIS
14h 50m
1 stop
$1,105Multiple Airlines
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.

What is the cheapest flight to St. Louis?

These are the best round-trip prices found by users searching on KAYAK in the last 72 hours.

In the last 3 days, the cheapest flight deal to St. Louis was found on the route from Porto, at $958 return. The most popular connection is from New York to St. Louis and KAYAK users have found round-trip deals for as low as $295 in the last 3 days.

Good to know

Cheapest flight$594
Flight from Porto to St. Louis

FAQs - booking St. Louis flights

  • What is the cheapest flight to St. Louis?

    In the last 3 days, the cheapest flight deal to St. Louis was found on the route from Porto, at $958 return. The most popular connection is from New York to St. Louis and KAYAK users have found round-trip deals for as low as $295 in the last 3 days.

  • 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.

  • 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.

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

    Each week there are around 2,970 direct flights from within Portugal to St. Louis. The most common day for departures is Sunday, 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