HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news

Cheap flights from St. Louis (STL) to Portugal from $410

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 9/1. 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.
STL — LIS
mei. 13 — mei. 201
From?
To?
ma 5/13
ma 5/20
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

How far in advance should I book a flight from St. Louis to Portugal?

Users have found that booking a flight from St. Louis to Portugal at least 41 days early can save you up to 60% on average compared to booking a flight this week. If booking 41 days before your flight isn’t an option for you, users have found flights from St. Louis to Portugal for as little as $729 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as $729 for flights departing within the next 3 days.

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

Flights from St. Louis to Portugal lean towards being more expensive in May. Prices are generally better when you fly from St. Louis to Portugal in January, with the cheapest ticket starting at $457.

When is the cheapest time to fly from St. Louis to Portugal (STL - PT)?

When flying from St. Louis to Portugal, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Cheap United Airlines flights from St. Louis to Portugal

Explore cheap flight options specifically provided by United Airlines for the route between St. Louis and Portugal. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,749,864 searches. Data last updated mei 8, 2024.
Take a look at some of the lowest-priced United Airlines flights heading from St. Louis to Portugal. Make sure to check back often as deals are often changing.
di 8/138:25 amSTL - LIS
1 stop20h 05mUnited Airlines
do 8/2911:25 amLIS - STL
2 stops28h 42mUnited Airlines
Deal found 5/7$708
zo 6/28:25 amSTL - LIS
1 stop20h 05mUnited Airlines
di 6/1111:25 amLIS - STL
1 stop15h 40mUnited Airlines
Deal found 5/7$1,094
ma 5/275:25 pmSTL - OPO
1 stop10h 20mUnited Airlines
zo 6/26:00 amOPO - STL
2 stops38h 14mUnited Airlines
Deal found 5/8$1,129
za 9/215:20 pmSTL - OPO
3 stops38h 50mUnited Airlines
za 10/512:35 pmOPO - STL
2 stops27h 13mUnited Airlines
Deal found 5/7$1,156
do 6/135:25 pmSTL - OPO
1 stop10h 20mUnited Airlines
wo 6/199:00 amOPO - STL
1 stop12h 58mUnited Airlines
Deal found 5/7$1,168
do 6/135:25 pmSTL - OPO
1 stop10h 20mUnited Airlines
wo 6/199:00 amOPO - STL
2 stops17h 25mUnited Airlines
Deal found 5/7$1,172

Cheap Air Canada flights from St. Louis to Portugal

Explore cheap flight options specifically provided by Air Canada for the route between St. Louis and Portugal. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,749,864 searches. Data last updated mei 8, 2024.
To aid your search, here are some of the cheapest Air Canada flights we've found from St. Louis to Portugal. Check back soon if you're not seeing flights that suit your needs.
di 8/1312:00 pmSTL - LIS
1 stop15h 20mAir Canada
do 8/2911:25 amLIS - STL
1 stop15h 40mAir Canada
Deal found 5/7$715
wo 9/184:05 pmSTL - LIS
2 stops35h 15mAir Canada
do 9/2612:50 pmLIS - STL
1 stop13h 10mAir Canada
Deal found 5/7$813
za 9/2110:10 amSTL - LIS
1 stop19h 00mAir Canada
za 9/289:45 amLIS - STL
2 stops35h 35mAir Canada
Deal found 5/7$854
wo 9/1810:10 amSTL - LIS
1 stop19h 00mAir Canada
do 9/2611:25 amLIS - STL
1 stop15h 40mAir Canada
Deal found 5/7$861
za 9/2110:10 amSTL - LIS
1 stop19h 00mAir Canada
za 9/289:45 amLIS - STL
1 stop17h 20mAir Canada
Deal found 5/7$870
zo 9/812:00 pmSTL - LIS
1 stop15h 20mAir Canada
za 9/219:45 amLIS - STL
2 stops35h 35mAir Canada
Deal found 5/7$940
do 9/1212:00 pmSTL - LIS
1 stop15h 20mAir Canada
ma 9/2311:25 amLIS - STL
2 stops33h 55mAir Canada
Deal found 5/7$966
do 9/1210:10 amSTL - LIS
1 stop19h 00mAir Canada
ma 9/2312:50 pmLIS - STL
1 stop32h 30mAir Canada
Deal found 5/7$972
do 9/1211:10 amSTL - LIS
2 stops16h 10mAir Canada
ma 9/2311:25 amLIS - STL
2 stops34h 24mAir Canada
Deal found 5/7$974

Cheap St. Louis to Portugal flights in May & June 2024

Find cheap flight options from St. Louis to Portugal specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,749,864 searches. Prices were last updated on mei 8, 2024.
Check out some of the best flight deals from St. Louis to Portugal in 2024. More deals are always being added, so be sure to check back regularly.
di 5/214:05 pmSTL - LIS
2 stops15h 30mMultiple Airlines
do 5/3011:25 amLIS - STL
1 stop15h 40mMultiple Airlines
Deal found 5/7$970
di 5/214:05 pmSTL - LIS
2 stops15h 30mAir Canada
do 5/3011:25 amLIS - STL
2 stops33h 56mAir Canada
Deal found 5/7$976
zo 6/234:48 pmSTL - LIS
1 stop10h 17mAmerican Airlines
wo 7/36:35 amLIS - STL
2 stops16h 43mAmerican Airlines
Deal found 5/7$1,019
zo 6/237:00 amSTL - LIS
2 stops20h 05mAmerican Airlines
wo 7/36:35 amLIS - STL
2 stops21h 27mAmerican Airlines
Deal found 5/7$1,022
zo 6/166:08 pmSTL - LIS
2 stops23h 07mBritish Airways
ma 6/245:10 pmLIS - STL
2 stops33h 46mBritish Airways
Deal found 5/6$1,035
zo 6/239:06 amSTL - LIS
1 stop17h 59mAmerican Airlines
wo 7/310:15 pmLIS - STL
2 stops22h 09mAmerican Airlines
Deal found 5/8$1,039
di 6/183:23 pmSTL - LIS
2 stops17h 27mDelta
wo 6/2610:00 amLIS - STL
2 stops16h 37mDelta
Deal found 5/7$1,040
zo 6/237:00 amSTL - LIS
2 stops20h 05mAmerican Airlines
wo 7/310:15 pmLIS - STL
2 stops22h 09mAmerican Airlines
Deal found 5/8$1,042
do 6/68:12 pmSTL - LIS
2 stops28h 18mMultiple Airlines
do 6/136:30 amLIS - STL
3 stops36h 11mMultiple Airlines
Deal found 5/7$1,052

St. Louis to Portugal 2024 flight deals

Discover exclusive flight deals for travel between St. Louis and Portugal in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,749,864 searches. Data last updated mei 8, 2024.
Check out some of the best flight deals from St. Louis to Portugal in 2024. More deals are always being added, so be sure to check back regularly.
ma 12/26:45 amSTL - LIS
2 stops19h 25mUnited Airlines
do 12/1211:00 amLIS - STL
2 stops29h 27mUnited Airlines
Deal found 5/7$588
ma 12/24:10 pmSTL - LIS
2 stops35h 10mMultiple Airlines
do 12/125:00 amLIS - STL
2 stops34h 53mMultiple Airlines
Deal found 5/7$595
ma 12/26:45 amSTL - LIS
1 stop20h 20mAmerican Airlines
do 12/128:45 amLIS - STL
1 stop17h 21mAmerican Airlines
Deal found 5/7$606
vr 11/294:10 pmSTL - LIS
1 stop11h 10mAir Canada
di 12/311:00 amLIS - STL
2 stops34h 21mAir Canada
Deal found 5/6$706
di 8/138:25 amSTL - LIS
1 stop20h 05mUnited Airlines
do 8/2911:25 amLIS - STL
2 stops28h 42mUnited Airlines
Deal found 5/7$708
vr 11/2910:30 amSTL - LIS
2 stops16h 50mAir Canada
di 12/311:00 amLIS - STL
2 stops34h 21mAir Canada
Deal found 5/6$711
vr 11/298:25 amSTL - LIS
1 stop20h 05mUnited Airlines
di 12/312:15 pmLIS - STL
1 stop31h 40mUnited Airlines
Deal found 5/6$715
wo 9/183:30 pmSTL - LIS
2 stops17h 20mDelta
do 9/265:40 amLIS - STL
2 stops21h 51mDelta
Deal found 5/7$757
do 11/284:10 pmSTL - OPO
2 stops20h 30mAir Canada
ma 12/26:00 amOPO - STL
2 stops33h 53mAir Canada
Deal found 5/6$778

One-way flights to Portugal from St. Louis

Search for one-way flight options from St. Louis to Portugal. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 2,749,864 searches. Data last updated mei 8, 2024.
Take a look at some of the one-way flights we've detected from St. Louis to Portugal. Users can also find round-trip St. Louis to Portugal flights by using the search form above.
zo 9/16:42 pmSTL - LIS
2 stops46h 38mMultiple Airlines
Deal found 5/7$410
ma 9/29:20 pmSTL - LIS
2 stops41h 35mMultiple Airlines
Deal found 5/7$416
ma 9/29:20 pmSTL - OPO
2 stops39h 30mMultiple Airlines
Deal found 5/7$420
ma 9/29:20 pmSTL - OPO
3 stops43h 35mMultiple Airlines
Deal found 5/7$444
zo 11/38:25 amSTL - LIS
1 stop20h 05mUnited Airlines
Deal found 5/7$502
ma 9/25:55 pmSTL - LIS
3 stops35h 45mMultiple Airlines
Deal found 5/7$526
di 7/238:05 amSTL - OPO
2 stops16h 50mUnited Airlines
Deal found 5/7$529
wo 7/245:30 pmSTL - OPO
2 stops23h 50mLufthansa
Deal found 5/7$548
za 6/298:02 pmSTL - LIS
3 stops40h 13mMultiple Airlines
Deal found 5/7$622

Find flights from St. Louis to Portugal within your budget

Customize your flight search to find flights from St. Louis to Portugal 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 2,749,864 searches. Data last updated mei 8, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$708 - $1,370

Route

Depart

Return

Price

Lambert-St LouisLisbon Humberto Delgado

STL - LIS

STLLIS

Lambert-St Louis

di 8/13

1 stop20h 05m

Lisbon Humberto Delgado

do 8/29

2 stops28h 42m

$708

Lambert-St LouisLisbon Humberto Delgado

STL - LIS

STLLIS

Lambert-St Louis

di 8/13

1 stop15h 20m

Lisbon Humberto Delgado

do 8/29

1 stop15h 40m

$715

Lambert-St LouisLisbon Humberto Delgado

STL - LIS

STLLIS

Lambert-St Louis

wo 9/18

2 stops17h 20m

Lisbon Humberto Delgado

do 9/26

2 stops21h 51m

$757

Lambert-St LouisLisbon Humberto Delgado

STL - LIS

STLLIS

Lambert-St Louis

wo 10/9

1 stop17h 46m

Lisbon Humberto Delgado

di 10/22

2 stops17h 19m

$840

Lambert-St LouisLisbon Humberto Delgado

STL - LIS

STLLIS

Lambert-St Louis

ma 7/29

2 stops15h 31m

Lisbon Humberto Delgado

di 8/6

2 stops24h 53m

$920

Lambert-St LouisLisbon Humberto Delgado

STL - LIS

STLLIS

Lambert-St Louis

zo 9/8

2 stops34h 49m

Lisbon Humberto Delgado

za 9/21

2 stops16h 39m

$951

Lambert-St LouisPorto

STL - OPO

STLOPO

Lambert-St Louis

ma 9/9

2 stops33h 15m

Porto

zo 9/22

2 stops26h 39m

$957

Lambert-St LouisLisbon Humberto Delgado

STL - LIS

STLLIS

Lambert-St Louis

do 10/3

2 stops31h 15m

Lisbon Humberto Delgado

zo 10/13

1 stop14h 25m

$1,043

Lambert-St LouisPorto

STL - OPO

STLOPO

Lambert-St Louis

ma 5/27

1 stop31h 30m

Porto

zo 6/2

2 stops32h 59m

$1,370

Flights are sorted by cheapest first

Deals found on 5/7

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

Reviews of airlines servicing Portugal

Get insights into the airlines that provide service to Portugal. 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 Portugal. Reviews last updated mei 8, 2024.
To help decide which airline to fly from St. Louis to Portugal, see what other customers have to say about United Airlines, Air Canada and Delta. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.1
Very good
10,810 reviews
Check prices

Crew

8.6

Food

7.4

Boarding

8.2

Entertainment

8.0

Overall

8.1

Comfort

7.9

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Delta
8.1
Very good
10,810 reviews
Delta
8.1
Very good
10,810 reviews
Check prices

Crew

8.6

Food

7.4

Boarding

8.2

Entertainment

8.0

Overall

8.1

Comfort

7.9

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Austrian Airlines
7.7
Good
1,065 reviews
Delta
8.1
Very good
10,810 reviews
Check prices

Crew

8.6

Food

7.4

Boarding

8.2

Entertainment

8.0

Overall

8.1

Comfort

7.9

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Turkish Airlines
7.5
Good
3,711 reviews
Delta
8.1
Very good
10,810 reviews
Check prices

Crew

8.6

Food

7.4

Boarding

8.2

Entertainment

8.0

Overall

8.1

Comfort

7.9

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

United Airlines
7.4
Good
11,073 reviews
Delta
8.1
Very good
10,810 reviews
Check prices

Crew

8.6

Food

7.4

Boarding

8.2

Entertainment

8.0

Overall

8.1

Comfort

7.9

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

American Airlines
7.3
Good
14,686 reviews
Delta
8.1
Very good
10,810 reviews
Check prices

Crew

8.6

Food

7.4

Boarding

8.2

Entertainment

8.0

Overall

8.1

Comfort

7.9

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Portugal. 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 from for flights from St. Louis to Portugal?

    Lambert-St Louis (STL), located 12.7 mi from the city center, is the airport you fly out of when you book flights from St. Louis to Portugal.

  • Can I find flights from St. Louis to Portugal for under $800 on Cheapflights?

    Yes, there are multiple flights from St. Louis to Portugal for under $800. The cheapest flight booked recently is on United Airlines for just $708, but on average you can expect to pay $859.

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

    For one-way options, check prices for United Airlines. According to our data, you can fly for as low as $502. Users have also found prices from $548 and $900 on Lufthansa and American Airlines, respectively.

  • What are the most popular routes from St. Louis to Portugal?

    When deciding which route to take from St. Louis to Portugal consider Lambert-St Louis - Lisbon Humberto Delgado, Lambert-St Louis - Porto or Lambert-St Louis - Lajes as they are the most popular.

  • What are the most popular airlines that fly from St. Louis to Portugal?

    When booking a flight from St. Louis to Portugal, you may want to consider flying on American Airlines, Air Canada or British Airways as they are the most popular for this route.

  • What does STL to LIS mean?

    Lambert-St Louis Airport is STL and Lisbon Humberto Delgado Airport is LIS. These codes are created by the International Air Transport Association (IATA) and airlines use them to identify the departing and arrival airports in the flight routes they service. Porto Airport (OPO), Faro Airport (FAO), Funchal Madeira Airport (FNC), Ponta Delgada Nordela Airport (PDL), Lajes Airport (TER) are other airports near this flight route and their unique identifiers/IATA codes.

  • Can I find deals for flights from St. Louis to Portugal that include extra baggage allowance?

    The amount of baggage you can bring on your St. Louis to Portugal flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from St. Louis to Portugal with specific airlines?

    Yes, Cheapflights allows you to browse and filter St. Louis to Portugal flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

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

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

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

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

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

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

  • Can I find deals for flights from St. Louis to Portugal that allow pets onboard?

    Many airlines flying from St. Louis to Portugal offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from St. Louis to Portugal?

    Yes, you can often find last-minute deals on St. Louis to Portugal flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the St. Louis to Portugal flight deals updated?

    The St. Louis to Portugal flight deals you see on this page were last updated on 5/7.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for St. Louis to Portugal
See prices for flight routes from nearby airports that may be better suited for you.

Kansas City to Heathrow flights
St. Louis to Heathrow flights
St. Louis to Frankfurt flights
Kansas City to Dublin flights
St. Louis to Leonardo da Vinci/Fiumicino flights
Kansas City to Leonardo da Vinci/Fiumicino flights
St. Louis to Dublin flights
Kansas City to Gatwick flights
Kansas City to Athens flights
Kansas City to Charles de Gaulle flights
St. Louis to Gatwick flights
St. Louis to Charles de Gaulle flights
St. Louis to Madrid flights
St. Louis to Athens flights
St. Louis to London City flights
St. Louis to Amsterdam flights
Kansas City to London City flights
Kansas City to Barcelona-El Prat flights
St. Louis to Lisbon flights
St. Louis to Zurich flights
St. Louis to Geneva flights
St. Louis to Barcelona-El Prat flights
Kansas City to Lisbon flights
Kansas City to Madrid flights
Kansas City to Edinburgh flights
Kansas City to Frankfurt flights
St. Louis to Keflavik Intl flights
St. Louis to Sarajevo flights
Kansas City to Amsterdam flights
St. Louis to Edinburgh flights
Kansas City to Orly flights
St. Louis to Vicenza flights
St. Louis to Munich flights
Kansas City to Oslo Gardermoen flights
St. Louis to Orly flights
Springfield to Heathrow flights
St. Louis to Malpensa flights
Kansas City to Istanbul flights
Kansas City to Vicenza flights
St. Louis to Istanbul flights
St. Louis to Linate flights
St. Louis to Shannon flights
Kansas City to Keflavik Intl flights
Kansas City to Florence flights
Kansas City to Zurich flights
St. Louis to Berlin flights
Kansas City to Munich flights
Kansas City to Malpensa flights
St. Louis to Oslo Gardermoen flights
St. Louis to Bruxelles-National flights

Top 8 airlines flying from St. Louis to Portugal

Discover the top 8 airlines that operate flights from St. Louis to Portugal. 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 2,749,864 searches. Data last updated mei 8, 2024.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$537Average$1,040FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
British AirwaysCheapest$554Average$913FlexibilityNo cancel feeOn-time70%
Search British Airways flights
United AirlinesCheapest$558Average$986FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
DeltaCheapest$596Average$926FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
IberiaCheapest$624Average$983FlexibilityNo cancel feeOn-time77%
Search Iberia flights
American AirlinesCheapest$625Average$1,094FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
KLMCheapest$666Average$876FlexibilityNo cancel feeOn-time75%
Search KLM flights
Air CanadaCheapest$843Average$1,281FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Austin to Dallas flights
Boston to Chicago flights
Dallas to Nashville flights
Chicago to Los Angeles flights
Cincinnati to Miami flights
USA to Amsterdam flights
Los Angeles to Reno flights
USA to Zurich flights
Houston to Dallas flights
Boston to Florida flights
Minneapolis to Orlando flights
St. Louis to Azores flights

Search flights from St. Louis to Portugal by cabin class

Find flights from St. Louis to Portugal, based on your preferred cabin class, be it economy, premium economy, business, or first class.
First Class
Business Class
Prem Econ Class
Economy Class

Book a flight to one of these trending destinations

User searches for flights to these destinations increased 20% or more in the past 90 days compared to other destinations
Flights to Ordu/Giresun
Flights to Hakodate
Flights to Gazipasa
Flights to Kirkwall Arpt
Flights to Skiathos
Flights to Bourgas
Flights to Kalamata
Flights to Menorca/Mahon
Flights to Mytilene
Flights to Mason City
Flights to Pau Pyrénées
Flights to Neiva La Marguita
Flights to Cortez Montezuma County
Flights to Biarritz Parme
Flights to Parikia Paros
Flights to Ohrid
Flights to Edremit/Korfez
Flights to Naxos
Flights to Dalaman
Flights to Lublin
Flights to Miyakojima Hirara
Flights to Champaign University-Willard
Flights to Kagoshima
Flights to Constanţa Mihail Kogalniceanu

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from St. Louis to Portugal?

Cheapflights helps you search for flights from St. Louis to Portugal via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from St. Louis to Portugal?

Cheapflights simply makes it quick and affordable to book flights from St. Louis to Portugal by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from St. Louis to Portugal with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from St. Louis to Portugal flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from St. Louis to Portugal become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Portugal from St. Louis today and book when prices fit your budget.

100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
View all available airlines