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$308+ Cheap flights from St. Louis (STL) to Lisbon (LIS)

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 10/13. Fares are subject to change and may not be available on all flights or dates of travel.
STL — LIS
Oct 29 — Nov 51
Wed 10/29
Wed 11/5
1 adult, Economy
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Cheapflights Tip: The best prices from Lambert-St Louis to Lisbon Humberto Delgado are usually found in November or February, booked 47 days in advance, depart on a Monday or Sunday and return on a Monday

Cheap flight deals from St. Louis to Lisbon

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Lisbon (LIS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 29, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$493
(Kiwi.com)

One-way from

$308
(Kiwi.com)

Popular in

June

Cheapest in

November

Average price

$1,059
Provider with most accurate pricing for Lambert-St Louis-Lisbon Humberto Delgado flight deals.
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Provider most trusted by Cheapflights users for Lambert-St Louis-Lisbon Humberto Delgado flights.
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From Lambert-St Louis to Lisbon Humberto Delgado
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One-way flight from Lambert-St Louis to Lisbon Humberto Delgado
Search Deals
Highest demand for flights based on searches. 20% potential increase in price ($237 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($36 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 St. Louis to Lisbon

Cheapest flights from St. Louis to Lisbon
Explore the most affordable flight options available from St. Louis to Lisbon. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 29, 2025.

This Kiwi.com deal was found by Cheapflights users on 9/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/123:50 pmSTL - LIS
1 stop13h 45mLufthansa
Wed 11/195:00 amLIS - STL
2 stops24h 44mLufthansa
Deal found 9/28$493
This Kiwi.com deal was found by Cheapflights users on 9/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/264:50 pmSTL - LIS
1 stop17h 15mLufthansa
Wed 11/125:00 amLIS - STL
1 stop14h 55mLufthansa
Deal found 9/29$503
This Mytrip deal was found by Cheapflights users on 9/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/274:05 pmSTL - LIS
1 stop12h 15mMultiple Airlines
Wed 11/125:00 amLIS - STL
1 stop14h 55mMultiple Airlines
Deal found 9/29$515
This United Airlines deal was found by Cheapflights users on 9/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2710:00 amSTL - LIS
2 stops17h 10mUnited Airlines
Wed 11/125:00 amLIS - STL
1 stop14h 55mUnited Airlines
Deal found 9/29$527
This United Airlines deal was found by Cheapflights users on 9/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/288:25 amSTL - LIS
1 stop20h 50mUnited Airlines
Wed 11/55:00 amLIS - STL
1 stop14h 55mUnited Airlines
Deal found 9/28$531
This Mytrip deal was found by Cheapflights users on 9/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/268:00 amSTL - LIS
2 stops20h 20mMultiple Airlines
Wed 11/125:00 amLIS - STL
1 stop14h 55mMultiple Airlines
Deal found 9/29$533
This KLM deal was found by Cheapflights users on 9/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/44:32 pmSTL - LIS
1 stop10h 23mKLM
Sun 12/75:00 amLIS - STL
2 stops17h 07mKLM
Deal found 9/28$538
This Air Canada deal was found by Cheapflights users on 9/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1811:05 amSTL - LIS
2 stops16h 15mAir Canada
Wed 2/411:20 amLIS - STL
2 stops31h 09mAir Canada
Deal found 9/29$539

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to Lisbon that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 29, 2025.
Use the filters below to find and compare flights from St. Louis to Lisbon that are best for you.

Fly from

St. Louis

Fly to

Lisbon

Route

Depart

Return

Price

St. LouisLisbon

STL - LIS

STLLIS

Lambert-St Louis

Sun 10/26

4:50 pm-3:05 pm

1 stop17h 15m

Lisbon Humberto Delgado

Wed 11/12

5:00 am-1:55 pm

1 stop14h 55m

$503

St. LouisLisbon

STL - LIS

STLLIS

Lambert-St Louis

Mon 10/27

4:05 pm-9:20 am

1 stop12h 15m

Lisbon Humberto Delgado

Wed 11/12

5:00 am-1:55 pm

1 stop14h 55m

$515

St. LouisLisbon

STL - LIS

STLLIS

Lambert-St Louis

Mon 10/27

10:00 am-8:10 am

2 stops17h 10m

Lisbon Humberto Delgado

Wed 11/12

5:00 am-1:55 pm

1 stop14h 55m

$527

St. LouisLisbon

STL - LIS

STLLIS

Lambert-St Louis

Wed 11/12

3:50 pm-2:50 pm

1 stop17h 00m

Lisbon Humberto Delgado

Wed 11/19

5:00 am-11:44 pm

2 stops24h 44m

$530

St. LouisLisbon

STL - LIS

STLLIS

Lambert-St Louis

Sun 10/26

8:00 am-9:20 am

2 stops20h 20m

Lisbon Humberto Delgado

Wed 11/12

5:00 am-1:55 pm

1 stop14h 55m

$533

St. LouisLisbon

STL - LIS

STLLIS

Lambert-St Louis

Thu 12/4

4:32 pm-8:55 am

1 stop10h 23m

Lisbon Humberto Delgado

Sun 12/7

5:00 am-4:07 pm

2 stops17h 07m

$538

St. LouisLisbon

STL - LIS

STLLIS

Lambert-St Louis

Thu 12/4

2:38 pm-2:35 pm

2 stops17h 57m

Lisbon Humberto Delgado

Sun 12/7

5:00 am-11:40 pm

2 stops24h 40m

$547

St. LouisLisbon

STL - LIS

STLLIS

Lambert-St Louis

Tue 11/18

8:00 am-9:20 am

2 stops19h 20m

Lisbon Humberto Delgado

Wed 2/4

11:20 am-3:29 pm

1 stop34h 09m

$551

St. LouisLisbon

STL - LIS

STLLIS

Lambert-St Louis

Wed 12/3

6:05 pm-8:00 am

2 stops31h 55m

Lisbon Humberto Delgado

Sun 12/7

5:30 am-11:40 pm

2 stops24h 10m

$559

St. LouisLisbon

STL - LIS

STLLIS

Lambert-St Louis

Wed 11/12

1:35 pm-10:15 am

2 stops14h 40m

Lisbon Humberto Delgado

Wed 11/19

10:15 am-10:22 pm

2 stops18h 07m

$560

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/27

Showing 1-10 of 19 results
1
2

Compare providers for flights from St. Louis to Lisbon

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Lisbon in September.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on St. Louis-Lisbon flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Lisbon flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Lisbon flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on St. Louis-Lisbon flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Lisbon flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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

Have a flexible travel schedule? Discover the best time to fly to Lisbon from St. Louis 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 St. Louis to Lisbon

How far ahead should I book a flight from St. Louis to Lisbon?

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Lisbon. Price data was last updated on September 26, 2025.

To ensure you get the cheapest price possible for a flight from St. Louis to Lisbon, you should look to book at least 47 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, January is the cheapest month in which you can book a flight from St. Louis to Lisbon (average of $612). Flying from St. Louis to Lisbon in June is currently the most expensive (average of $1,126). 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.

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

Find hourly flight availability from St. Louis to Lisbon. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 29, 2025.

A simple way to save on the total cost of your ticket is to fly from St. Louis to Lisbon at noon. If you’re flexible enough to do this you can expect to save up to 19% on your trip compared to booking a flight in the afternoon.

How much does it cost to fly round-trip from St. Louis to Lisbon?

Reviews of airlines servicing Lisbon

Get insights into the airlines that provide service to Lisbon. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Lisbon. Reviews last updated September 29, 2025.
Read through reviews of airlines operating flights from St. Louis to Lisbon, such as United Airlines, American Airlines, and Air Canada. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,924 reviews

Entertainment

7.1

Food

6.6

Comfort

7.3

Overall

7.4

Boarding

7.7

Crew

8.1

Reviews

1 / 20
4.0
Okay

Tim,Sep 2025

IAD - GSP

This was pretty bad. It’s chaos at the Dulles boarding gates for the small regional jets because they use one gate to board 3-4 flights at a time. So, it’s difficult knowing where and when to go. There is little space for any size of carrry-on, so most had to gate check their bags. However, the worst of it was that our single flight attendant fell asleep before we took off and the pilot couldn’t do so until she responded to his messages. My wife had to wake her up! So we were a little late leaving. Not to be thwarted, the flight attendant fell asleep right after take off and there was no sight of her during the flight. When the aircraft touched down, a tray of unsecured canned drinks came crashing onto the aisle up front. I can only assume someone didn’t do what they were supposed to. The pilot was great, but I’m sure he must not be happy with this crew member.
United Airlines
7.4
Good
8,924 reviews
United Airlines
7.4
Good
8,924 reviews

Entertainment

7.1

Food

6.6

Comfort

7.3

Overall

7.4

Boarding

7.7

Crew

8.1

Reviews

1 / 20
4.0
Okay

Tim,Sep 2025

IAD - GSP

This was pretty bad. It’s chaos at the Dulles boarding gates for the small regional jets because they use one gate to board 3-4 flights at a time. So, it’s difficult knowing where and when to go. There is little space for any size of carrry-on, so most had to gate check their bags. However, the worst of it was that our single flight attendant fell asleep before we took off and the pilot couldn’t do so until she responded to his messages. My wife had to wake her up! So we were a little late leaving. Not to be thwarted, the flight attendant fell asleep right after take off and there was no sight of her during the flight. When the aircraft touched down, a tray of unsecured canned drinks came crashing onto the aisle up front. I can only assume someone didn’t do what they were supposed to. The pilot was great, but I’m sure he must not be happy with this crew member.
American Airlines
7.2
Good
10,000 reviews
United Airlines
7.4
Good
8,924 reviews

Entertainment

7.1

Food

6.6

Comfort

7.3

Overall

7.4

Boarding

7.7

Crew

8.1

Reviews

1 / 20
4.0
Okay

Tim,Sep 2025

IAD - GSP

This was pretty bad. It’s chaos at the Dulles boarding gates for the small regional jets because they use one gate to board 3-4 flights at a time. So, it’s difficult knowing where and when to go. There is little space for any size of carrry-on, so most had to gate check their bags. However, the worst of it was that our single flight attendant fell asleep before we took off and the pilot couldn’t do so until she responded to his messages. My wife had to wake her up! So we were a little late leaving. Not to be thwarted, the flight attendant fell asleep right after take off and there was no sight of her during the flight. When the aircraft touched down, a tray of unsecured canned drinks came crashing onto the aisle up front. I can only assume someone didn’t do what they were supposed to. The pilot was great, but I’m sure he must not be happy with this crew member.
Air Canada
7.1
Good
10,000 reviews
United Airlines
7.4
Good
8,924 reviews

Entertainment

7.1

Food

6.6

Comfort

7.3

Overall

7.4

Boarding

7.7

Crew

8.1

Reviews

1 / 20
4.0
Okay

Tim,Sep 2025

IAD - GSP

This was pretty bad. It’s chaos at the Dulles boarding gates for the small regional jets because they use one gate to board 3-4 flights at a time. So, it’s difficult knowing where and when to go. There is little space for any size of carrry-on, so most had to gate check their bags. However, the worst of it was that our single flight attendant fell asleep before we took off and the pilot couldn’t do so until she responded to his messages. My wife had to wake her up! So we were a little late leaving. Not to be thwarted, the flight attendant fell asleep right after take off and there was no sight of her during the flight. When the aircraft touched down, a tray of unsecured canned drinks came crashing onto the aisle up front. I can only assume someone didn’t do what they were supposed to. The pilot was great, but I’m sure he must not be happy with this crew member.
Iberia
7.0
Good
2,959 reviews
United Airlines
7.4
Good
8,924 reviews

Entertainment

7.1

Food

6.6

Comfort

7.3

Overall

7.4

Boarding

7.7

Crew

8.1

Reviews

1 / 20
4.0
Okay

Tim,Sep 2025

IAD - GSP

This was pretty bad. It’s chaos at the Dulles boarding gates for the small regional jets because they use one gate to board 3-4 flights at a time. So, it’s difficult knowing where and when to go. There is little space for any size of carrry-on, so most had to gate check their bags. However, the worst of it was that our single flight attendant fell asleep before we took off and the pilot couldn’t do so until she responded to his messages. My wife had to wake her up! So we were a little late leaving. Not to be thwarted, the flight attendant fell asleep right after take off and there was no sight of her during the flight. When the aircraft touched down, a tray of unsecured canned drinks came crashing onto the aisle up front. I can only assume someone didn’t do what they were supposed to. The pilot was great, but I’m sure he must not be happy with this crew member.
Lufthansa
6.8
Okay
7,435 reviews
United Airlines
7.4
Good
8,924 reviews

Entertainment

7.1

Food

6.6

Comfort

7.3

Overall

7.4

Boarding

7.7

Crew

8.1

Reviews

1 / 20
4.0
Okay

Tim,Sep 2025

IAD - GSP

This was pretty bad. It’s chaos at the Dulles boarding gates for the small regional jets because they use one gate to board 3-4 flights at a time. So, it’s difficult knowing where and when to go. There is little space for any size of carrry-on, so most had to gate check their bags. However, the worst of it was that our single flight attendant fell asleep before we took off and the pilot couldn’t do so until she responded to his messages. My wife had to wake her up! So we were a little late leaving. Not to be thwarted, the flight attendant fell asleep right after take off and there was no sight of her during the flight. When the aircraft touched down, a tray of unsecured canned drinks came crashing onto the aisle up front. I can only assume someone didn’t do what they were supposed to. The pilot was great, but I’m sure he must not be happy with this crew member.

Related info for your journey

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

  • How long is the flight from St. Louis to Lisbon?

    Lufthansa and United Airlines can get you from St. Louis to Lisbon in just under 17h 10m. Your travel time can differ by up to 05m. The distance from St. Louis to Lisbon is about 4212 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from St. Louis to Lisbon round-trip?

    Currently priced at $566, Iberia will fly you from St. Louis to Lisbon and back. In addition to Iberia, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from United Airlines and Lufthansa - these airlines can fly you to your destination from $605 and $630, respectively. Users have found that Iberia is 38% cheaper than the other options available to this destination.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from St. Louis to Lisbon 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 St. Louis to Lisbon?

    Currently, January is the cheapest month in which you can book a flight from St. Louis to Lisbon (average of $612). Flying from St. Louis to Lisbon in June is currently the most expensive (average of $1,126). 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

Traveling to a place near Lisbon?

Book flights to Lisbon if you plan to visit one of these locations
Sintra
Fátima
Oeiras
Beja
Nazaré
Ericeira
Costa da Caparica
Torres Vedras
Sesimbra
Colares

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Alternative routes for St. Louis to Lisbon

See prices for flight routes from nearby airports that may be better suited for you.
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Top 7 airlines flying from St. Louis to Lisbon

Discover the top 7 airlines that operate flights from St. Louis to Lisbon. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
IberiaCheapest$566Average$761FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$605Average$978FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$630Average$964FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$664Average$1,174FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$667Average$853FlexibilityNo cancel feeOn-time70%
DeltaCheapest$680Average$884FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$823Average$1,106FlexibilityNo cancel feeOn-time67%

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