How long is the flight from Portugal to St. Louis?

Departing from Portugal to St. Louis will take you 15h 55m. Airlines will cover a distance of 4212 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

What are the cheapest airlines to fly from Portugal to St. Louis one-way?

To fly one-way, consider booking your trip with Iberia, which is currently one of the cheapest options available, starting at $540. American Airlines flights start at $543 while deals on British Airways start at $736 one-way.

What is the cheapest month to book a flight from Portugal to St. Louis?

Currently, August is the cheapest month in which you can book a flight from Portugal to St. Louis (average of $311). Flying from Portugal to St. Louis in March is currently the most expensive (average of $356). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

What is the cheapest month to fly from Portugal to St. Louis?

The best pricing can be found in the month of December. Prices to St. Louis from Portugal average $1,009. You can even find prices in December for less than $1,009, as users have found deals to St. Louis from as low as $783. The month of October appears to be one of the more expensive times to travel to St. Louis from Portugal. Flying in the targeted month can save you up to 57%.

What is the cheapest time of day to fly from PT to STL?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Portugal to St. Louis as you normally would.

What airport do you fly into for flights to St. Louis from Portugal?

Lambert-St Louis (STL) is the airport you will fly into if you book a flight from Portugal to St. Louis. It is only a 12.7 mi journey from Lambert-St Louis (STL) to St. Louis’s city center.

Can I find deals for flights from Portugal to St. Louis that include hotel bookings?

Yes. In addition to deals on Portugal to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Portugal to St. Louis?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portugal to St. Louis.

Can I find deals for business class flights from Portugal to St. Louis?

Yes. Cheapflights offers flight deals from Portugal to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$429+ Flights from Portugal to St. Louis

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Cheap flight deals from Portugal to St. Louis

Round-trip from	$715 (Delta)
One-way from	$429 (Kiwi.com)
Popular in	October
Cheapest in	December
Average price	$1,026

From Portugal to Lambert-St Louis

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One-way flight from Portugal to Lambert-St Louis

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Highest demand for flights based on searches. 14% potential increase in price ($177 potential increase over avg. RT price).

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Cheapest flight prices on average. 6% potential price decrease ($59 potential savings vs. average RT price).

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Average for round-trip flights in September 2025

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Find flight deals from Portugal to St. Louis

Cheapest flights from Portugal to St. Louis
Explore the most affordable flight options available from Portugal to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on septiembre 15, 2025.

mar. 11/45:00 amLIS - STL

2 stops18h 29mDelta

mar. 11/182:36 pmSTL - LIS

2 stops14h 44mDelta

Deal found 9/13

$715

mié. 11/511:05 amLIS - STL

1 stop15h 55mAmerican Airlines

jue. 11/2011:33 amSTL - LIS

2 stops18h 37mAmerican Airlines

Deal found 9/13

$723

mié. 11/511:05 amLIS - STL

1 stop15h 55mBritish Airways

mar. 11/185:40 pmSTL - LIS

2 stops22h 05mBritish Airways

Deal found 9/13

$724

jue. 12/410:55 amLIS - STL

1 stop15h 26mBritish Airways

lun. 12/81:59 pmSTL - LIS

2 stops18h 56mBritish Airways

Deal found 9/14

$725

mié. 11/55:30 amLIS - STL

2 stops17h 59mDelta

mié. 11/1910:45 amSTL - LIS

2 stops17h 50mDelta

Deal found 9/13

$726

mié. 11/55:30 amLIS - STL

2 stops17h 59mAir France

mar. 11/182:36 pmSTL - LIS

2 stops14h 44mAir France

Deal found 9/13

$729

lun. 11/35:00 amLIS - STL

2 stops19h 02mDelta

lun. 11/174:30 pmSTL - LIS

1 stop10h 30mDelta

Deal found 9/13

$733

jue. 11/610:55 amLIS - STL

1 stop15h 26mBritish Airways

mié. 11/1910:44 amSTL - LIS

1 stop16h 11mBritish Airways

Deal found 9/13

$736

lun. 9/2211:05 amLIS - STL

1 stop31h 18mAmerican Airlines

dom. 9/286:00 amSTL - LIS

1 stop21h 05mAmerican Airlines

Deal found 9/15

$737

sáb. 11/110:30 amLIS - STL

2 stops29h 43mAmerican Airlines

jue. 11/201:45 pmSTL - LIS

2 stops16h 25mAmerican Airlines

Deal found 9/13

$741

Best flights from Portugal to St. Louis
Discover carefully curated flight deals from Portugal to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated septiembre 15, 2025.

mié. 10/225:00 amLIS - STL

2 stops18h 29mDelta

mié. 11/1212:49 pmSTL - LIS

2 stops16h 31mDelta

Deal found 9/14

$715

mié. 11/511:05 amLIS - STL

1 stop15h 55mBritish Airways

lun. 11/172:17 pmSTL - LIS

2 stops22h 38mBritish Airways

Deal found 9/13

$724

jue. 12/410:55 amLIS - STL

2 stops19h 03mAmerican Airlines

lun. 12/84:49 pmSTL - LIS

2 stops16h 06mAmerican Airlines

Deal found 9/13

$724

vie. 2/612:25 pmOPO - STL

2 stops26h 29mIberia

dom. 2/81:30 pmSTL - OPO

2 stops16h 15mIberia

Deal found 9/13

$775

vie. 11/711:05 amLIS - STL

1 stop15h 55mBritish Airways

sáb. 11/152:17 pmSTL - LIS

2 stops18h 33mBritish Airways

Deal found 9/13

$724

vie. 11/711:05 amLIS - STL

1 stop15h 55mBritish Airways

dom. 11/168:39 amSTL - LIS

2 stops31h 06mBritish Airways

Deal found 9/13

$724

vie. 11/711:05 amLIS - STL

1 stop15h 55mBritish Airways

lun. 11/174:42 pmSTL - LIS

2 stops23h 13mBritish Airways

Deal found 9/13

$724

mié. 11/511:05 amLIS - STL

1 stop15h 55mBritish Airways

mar. 11/1810:15 amSTL - LIS

2 stops25h 25mBritish Airways

Deal found 9/13

$724

jue. 12/410:55 amLIS - STL

1 stop15h 26mBritish Airways

lun. 12/81:59 pmSTL - LIS

2 stops18h 56mBritish Airways

Deal found 9/13

$725

Last-minute flights from Portugal to St. Louis
Discover last-minute flight deals from Portugal to St. Louis. Data last updated septiembre 15, 2025 and is based on user searches.

sáb. 9/2011:05 amLIS - STL

1 stop15h 43mBritish Airways

jue. 9/251:03 pmSTL - LIS

1 stop14h 02mBritish Airways

Deal found 9/13

$736

sáb. 9/2011:05 amLIS - STL

2 stops18h 02mAmerican Airlines

jue. 9/2510:54 amSTL - LIS

2 stops16h 11mAmerican Airlines

Deal found 9/13

$750

sáb. 9/202:10 pmLIS - STL

3 stops31h 08mMultiple Airlines

jue. 9/251:00 pmSTL - LIS

2 stops13h 00mMultiple Airlines

Deal found 9/13

$1,654

lun. 9/2211:05 amLIS - STL

1 stop31h 18mAmerican Airlines

dom. 9/286:00 amSTL - LIS

1 stop21h 05mAmerican Airlines

Deal found 9/15

$737

lun. 9/2211:05 amLIS - STL

1 stop16h 01mBritish Airways

dom. 9/288:03 pmSTL - LIS

2 stops21h 02mBritish Airways

Deal found 9/15

$742

mié. 10/225:00 amLIS - STL

2 stops18h 29mDelta

mié. 11/1212:49 pmSTL - LIS

2 stops16h 31mDelta

Deal found 9/14

$715

mié. 10/2211:05 amLIS - STL

1 stop15h 09mAmerican Airlines

mié. 11/126:00 amSTL - LIS

1 stop20h 55mAmerican Airlines

Deal found 9/14

$744

mié. 10/2210:35 amLIS - STL

3 stops29h 27mMultiple Airlines

mié. 11/123:50 pmSTL - LIS

2 stops25h 35mMultiple Airlines

Deal found 9/14

$1,025

One-way flights from Portugal to St. Louis
Search for one-way flight options from Portugal to St. Louis. Find affordable one-way fares based on user searches. Data last updated septiembre 15, 2025.

mié. 10/298:15 pmLIS - STL

3 stops46h 42mMultiple Airlines

Deal found 9/13

$429

vie. 11/2111:05 amLIS - STL

1 stop15h 50mIberia

Deal found 9/13

$540

vie. 11/216:30 amLIS - STL

2 stops18h 20mAmerican Airlines

Deal found 9/14

$543

mar. 11/256:30 amLIS - STL

2 stops18h 57mAmerican Airlines

Deal found 9/13

$544

mié. 11/2611:15 amLIS - STL

2 stops31h 22mAmerican Airlines

Deal found 9/13

$565

sáb. 11/227:00 amLIS - STL

2 stops38h 12mAmerican Airlines

Deal found 9/13

$575

dom. 11/237:05 amLIS - STL

2 stops33h 58mAmerican Airlines

Deal found 9/13

$600

mié. 10/2911:05 amLIS - STL

1 stop14h 15mIberia

Deal found 9/13

$626

mié. 10/298:40 pmOPO - STL

2 stops27h 29mBritish Airways

Deal found 9/15

$736

mié. 10/296:00 amOPO - STL

1 stop13h 55mLufthansa

Deal found 9/14

$748

Cheapflights Fare Finder

Use the filters below to find and compare flights from Portugal to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LisbonSt. Louis

LIS - STL

LISSTL

Lisbon Humberto Delgado

mié. 10/22

5:00 am-5:29 pm

2 stops18h 29m

Lambert-St Louis

mié. 11/12

12:49 pm-11:20 am

2 stops16h 31m

$715

LisbonSt. Louis

LIS - STL

LISSTL

Lisbon Humberto Delgado

mié. 11/5

11:05 am-9:00 pm

1 stop15h 55m

Lambert-St Louis

lun. 11/17

2:17 pm-6:55 pm

2 stops22h 38m

$724

LisbonSt. Louis

LIS - STL

LISSTL

Lisbon Humberto Delgado

jue. 12/4

10:55 am-11:58 pm

2 stops19h 03m

Lambert-St Louis

lun. 12/8

4:49 pm-2:55 pm

2 stops16h 06m

$724

LisbonSt. Louis

LIS - STL

LISSTL

Lisbon Humberto Delgado

vie. 11/7

11:05 am-9:00 pm

1 stop15h 55m

Lambert-St Louis

sáb. 11/15

2:17 pm-2:50 pm

2 stops18h 33m

$724

LisbonSt. Louis

LIS - STL

LISSTL

Lisbon Humberto Delgado

vie. 11/7

11:05 am-9:00 pm

1 stop15h 55m

Lambert-St Louis

dom. 11/16

8:39 am-9:45 pm

2 stops31h 06m

$724

LisbonSt. Louis

LIS - STL

LISSTL

Lisbon Humberto Delgado

vie. 11/7

11:05 am-9:00 pm

1 stop15h 55m

Lambert-St Louis

lun. 11/17

4:42 pm-9:55 pm

2 stops23h 13m

$724

LisbonSt. Louis

LIS - STL

LISSTL

Lisbon Humberto Delgado

mié. 11/5

11:05 am-9:00 pm

1 stop15h 55m

Lambert-St Louis

mar. 11/18

10:15 am-5:40 pm

2 stops25h 25m

$724

LisbonSt. Louis

LIS - STL

LISSTL

Lisbon Humberto Delgado

jue. 12/4

10:55 am-8:21 pm

1 stop15h 26m

Lambert-St Louis

lun. 12/8

1:59 pm-2:55 pm

2 stops18h 56m

$725

PortoSt. Louis

OPO - STL

OPOSTL

Porto

vie. 2/6

12:25 pm-8:54 am

2 stops26h 29m

Lambert-St Louis

dom. 2/8

1:30 pm-11:45 am

2 stops16h 15m

$775

LisbonSt. Louis

LIS - STL

LISSTL

Lisbon Humberto Delgado

mié. 10/29

8:15 pm-1:57 pm

3 stops46h 42m

$429

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

Showing 1-10 of 19 results

Best time to book a flight from Portugal to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Portugal with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Portugal to St. Louis

No data available for this route at this time. Please check back soon.

Related info for your journey

What airport do you fly into for flights to St. Louis from Portugal?
Lambert-St Louis (STL) is the airport you will fly into if you book a flight from Portugal to St. Louis. It is only a 12.7 mi journey from Lambert-St Louis (STL) to St. Louis’s city center.
How long is the flight from Portugal to St. Louis?
Departing from Portugal to St. Louis will take you 15h 55m. Airlines will cover a distance of 4212 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.
What are the cheapest airlines to fly from Portugal to St. Louis one-way?
To fly one-way, consider booking your trip with Iberia, which is currently one of the cheapest options available, starting at $540. American Airlines flights start at $543 while deals on British Airways start at $736 one-way.
Can I find deals for flights from Portugal to St. Louis that include hotel bookings?
Yes. In addition to deals on Portugal to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Portugal to St. Louis?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portugal to St. Louis.
Can I find deals for business class flights from Portugal to St. Louis?
Yes. Cheapflights offers flight deals from Portugal to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Portugal to St. Louis?
Currently, August is the cheapest month in which you can book a flight from Portugal to St. Louis (average of $311). Flying from Portugal to St. Louis in March is currently the most expensive (average of $356). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Edwardsville

O'Fallon

Fairview Heights

Maryland Heights

Collinsville

Eureka

Glencoe

St. Peters

Chesterfield

Alton

Farmington

Festus

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$429+ Cheap flights from Portugal to St. Louis (STL)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/29. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Portugal to St. Louis with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Portugal to St. Louis

Keep the following information in mind while searching for Portugal to St. Louis flight deals. Data was last updated septiembre 15, 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Portugal to St. Louis

Cheapest flights from Portugal to St. LouisExplore the most affordable flight options available from Portugal to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on septiembre 15, 2025.

Explore the most affordable flight options available from Portugal to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on septiembre 15, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Portugal to St. Louis that are best for you.

Best time to book a flight from Portugal to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Portugal with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Portugal to St. Louis

Related info for your journey

Find useful and relevant information for your journey from Portugal to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly into for flights to St. Louis from Portugal?

How long is the flight from Portugal to St. Louis?

What are the cheapest airlines to fly from Portugal to St. Louis one-way?

Can I find deals for flights from Portugal to St. Louis that include hotel bookings?

How can I find direct flights from Portugal to St. Louis?

Can I find deals for business class flights from Portugal to St. Louis?

What is the cheapest month to book a flight from Portugal to St. Louis?

Traveling to a place near St. Louis?

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Alternative routes for Portugal to St. Louis

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Cheapest flights from Portugal to St. Louis
Explore the most affordable flight options available from Portugal to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on septiembre 15, 2025.