HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news

Cheap flights from St. Louis (STL) to Portugal from $529

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 7/22. 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
May 7 — May 141
From?
To?
Tue 5/7
Tue 5/14
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 20 days early can save you up to 134% on average compared to booking a flight this week. If booking 20 days before your flight isn’t an option for you, users have found flights from St. Louis to Portugal for as little as $1,231 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 $1,231 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 July. Prices are generally better when you fly from St. Louis to Portugal in January, with the cheapest ticket starting at $585.

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 Delta flights from St. Louis to Portugal

Explore cheap flight options specifically provided by Delta 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 2,899,487 searches. Data last updated May 2, 2024.
Take a look at some of the lowest-priced Delta flights heading from St. Louis to Portugal. Make sure to check back often as deals are often changing.
Wed 9/183:30 pmSTL - LIS
2 stops17h 20mDelta
Thu 9/265:40 amLIS - STL
2 stops21h 51mDelta
Deal found 5/2$757
Thu 8/15:59 pmSTL - OPO
2 stops22h 16mDelta
Fri 8/309:15 amOPO - STL
2 stops18h 14mDelta
Deal found 5/2$856
Sun 9/227:15 pmSTL - OPO
2 stops21h 00mDelta
Wed 10/26:30 amOPO - STL
2 stops23h 05mDelta
Deal found 5/1$859
Sun 8/1111:51 amSTL - OPO
2 stops21h 39mDelta
Mon 8/199:15 amOPO - STL
2 stops18h 14mDelta
Deal found 5/2$878
Tue 9/102:05 pmSTL - OPO
2 stops19h 25mDelta
Fri 9/209:15 amOPO - STL
2 stops29h 36mDelta
Deal found 5/1$902
Mon 9/97:15 pmSTL - OPO
2 stops14h 25mDelta
Fri 9/209:15 amOPO - STL
2 stops29h 36mDelta
Deal found 4/30$913
Sun 9/82:05 pmSTL - OPO
2 stops19h 25mDelta
Sat 9/2111:25 amOPO - STL
2 stops31h 43mDelta
Deal found 5/1$947
Sun 9/82:05 pmSTL - LIS
2 stops18h 45mDelta
Sat 9/215:40 amLIS - STL
2 stops21h 51mDelta
Deal found 5/1$952
Mon 9/97:15 pmSTL - OPO
2 stops21h 00mDelta
Sat 9/216:30 amOPO - STL
2 stops20h 01mDelta
Deal found 5/1$960

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 2,899,487 searches. Data last updated May 2, 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.
Wed 10/1612:00 pmSTL - LIS
1 stop15h 20mAir Canada
Mon 10/2112:50 pmLIS - STL
1 stop32h 30mAir Canada
Deal found 4/30$875
Sat 9/2112:00 pmSTL - LIS
2 stops17h 10mAir Canada
Sat 9/289:45 amLIS - STL
2 stops35h 35mAir Canada
Deal found 5/1$881
Wed 9/1810:10 amSTL - LIS
1 stop19h 00mAir Canada
Thu 9/2612:50 pmLIS - STL
1 stop13h 10mAir Canada
Deal found 5/1$883
Wed 9/184:05 pmSTL - LIS
2 stops35h 15mAir Canada
Thu 9/2612:50 pmLIS - STL
1 stop13h 10mAir Canada
Deal found 5/1$892
Sat 9/2112:00 pmSTL - LIS
2 stops17h 10mAir Canada
Sat 9/289:45 amLIS - STL
1 stop17h 20mAir Canada
Deal found 5/1$896
Wed 9/1810:10 amSTL - LIS
1 stop19h 00mAir Canada
Thu 9/2611:25 amLIS - STL
1 stop15h 40mAir Canada
Deal found 5/2$898
Wed 7/310:10 amSTL - LIS
2 stops17h 10mAir Canada
Wed 7/1011:25 amLIS - STL
2 stops33h 56mAir Canada
Deal found 5/1$1,016
Sat 9/214:05 pmSTL - LIS
1 stop13h 05mAir Canada
Sun 9/2912:50 pmLIS - STL
1 stop32h 30mAir Canada
Deal found 4/30$1,026
Wed 7/34:05 pmSTL - LIS
1 stop13h 05mAir Canada
Wed 7/1011:25 amLIS - STL
1 stop15h 40mAir Canada
Deal found 5/1$1,031

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 2,899,487 searches. Prices were last updated on May 2, 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.
Wed 5/295:08 pmSTL - LIS
2 stops18h 52mBritish Airways
Mon 6/106:45 pmLIS - STL
2 stops25h 41mBritish Airways
Deal found 4/30$1,063
Thu 5/309:50 amSTL - LIS
2 stops17h 30mAir Canada
Thu 6/612:50 pmLIS - STL
2 stops38h 15mAir Canada
Deal found 5/1$1,066
Thu 5/3010:46 amSTL - LIS
2 stops16h 19mAmerican Airlines
Thu 6/611:05 amLIS - STL
1 stop15h 51mAmerican Airlines
Deal found 5/1$1,072
Wed 5/2911:17 amSTL - LIS
1 stop15h 48mBritish Airways
Mon 6/107:15 amLIS - STL
2 stops20h 47mBritish Airways
Deal found 4/30$1,087
Thu 5/308:25 amSTL - LIS
1 stop20h 05mMultiple Airlines
Thu 6/611:25 amLIS - STL
1 stop15h 40mMultiple Airlines
Deal found 5/1$1,162
Wed 5/296:00 amSTL - TER
2 stops19h 30mMultiple Airlines
Wed 6/51:00 pmTER - STL
3 stops33h 28mMultiple Airlines
Deal found 5/1$1,188
Sat 5/253:05 pmSTL - LIS
2 stops21h 35mDelta
Sat 6/15:40 amLIS - STL
2 stops22h 12mDelta
Deal found 5/2$1,243
Fri 5/249:50 amSTL - LIS
2 stops19h 35mAir Canada
Fri 5/3111:25 amLIS - STL
2 stops33h 56mAir Canada
Deal found 5/2$1,280
Fri 5/245:31 pmSTL - LIS
2 stops22h 09mLufthansa
Fri 5/315:05 amLIS - STL
1 stop14h 25mLufthansa
Deal found 5/2$1,291

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 2,899,487 searches. Data last updated May 2, 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.
Mon 12/24:10 pmSTL - LIS
2 stops35h 10mMultiple Airlines
Thu 12/125:00 amLIS - STL
2 stops40h 23mMultiple Airlines
Deal found 5/1$595
Mon 12/26:45 amSTL - LIS
1 stop20h 20mAmerican Airlines
Thu 12/128:45 amLIS - STL
1 stop17h 21mAmerican Airlines
Deal found 5/2$606
Mon 12/26:45 amSTL - LIS
1 stop20h 20mAmerican Airlines
Thu 12/128:45 amLIS - STL
1 stop33h 05mAmerican Airlines
Deal found 5/1$611
Fri 11/153:55 pmSTL - OPO
1 stop17h 50mUnited Airlines
Thu 11/2112:30 pmOPO - STL
1 stop31h 25mUnited Airlines
Deal found 5/2$674
Fri 11/158:00 amSTL - OPO
2 stops21h 35mUnited Airlines
Thu 11/2112:30 pmOPO - STL
1 stop31h 25mUnited Airlines
Deal found 5/2$678
Fri 11/156:45 amSTL - OPO
2 stops27h 00mUnited Airlines
Thu 11/2112:30 pmOPO - STL
2 stops32h 51mUnited Airlines
Deal found 5/2$688
Fri 11/2910:40 amSTL - LIS
1 stop16h 40mAir Canada
Tue 12/311:00 amLIS - STL
2 stops29h 27mAir Canada
Deal found 4/30$706
Fri 11/83:55 pmSTL - OPO
1 stop13h 40mUnited Airlines
Sun 11/246:00 amOPO - STL
1 stop13h 55mUnited Airlines
Deal found 4/30$707
Fri 11/84:10 pmSTL - OPO
2 stops17h 35mAir Canada
Sun 11/246:00 amOPO - STL
2 stops33h 53mAir Canada
Deal found 4/30$708

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 2,899,487 searches. Data last updated May 2, 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.
Mon 7/2210:19 amSTL - OPO
2 stops17h 26mUnited Airlines
Deal found 5/1$529
Wed 7/242:10 pmSTL - OPO
2 stops19h 20mDelta
Deal found 5/1$546
Wed 7/243:25 pmSTL - OPO
1 stop13h 55mLufthansa
Deal found 5/1$878
Wed 7/249:20 pmSTL - OPO
3 stops59h 50mMultiple Airlines
Deal found 5/1$880
Sat 6/296:27 pmSTL - LIS
2 stops32h 38mAmerican Airlines
Deal found 5/1$881
Sat 6/291:04 pmSTL - LIS
1 stop15h 31mLufthansa
Deal found 5/1$1,124

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 2,899,487 searches. Data last updated May 2, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$757 - $1,137

Route

Depart

Return

Price

Lambert-St LouisLisbon Humberto Delgado

STL - LIS

STLLIS

Lambert-St Louis

Wed 9/18

2 stops17h 20m

Lisbon Humberto Delgado

Thu 9/26

2 stops21h 51m

$757

Lambert-St LouisLisbon Humberto Delgado

STL - LIS

STLLIS

Lambert-St Louis

Wed 10/16

1 stop15h 20m

Lisbon Humberto Delgado

Mon 10/21

1 stop32h 30m

$875

Lambert-St LouisLisbon Humberto Delgado

STL - LIS

STLLIS

Lambert-St Louis

Wed 10/16

1 stop17h 46m

Lisbon Humberto Delgado

Mon 10/21

2 stops19h 32m

$884

Lambert-St LouisLisbon Humberto Delgado

STL - LIS

STLLIS

Lambert-St Louis

Sat 9/21

2 stops21h 44m

Lisbon Humberto Delgado

Sat 9/28

2 stops26h 32m

$901

Lambert-St LouisLisbon Humberto Delgado

STL - LIS

STLLIS

Lambert-St Louis

Wed 7/17

2 stops15h 05m

Lisbon Humberto Delgado

Wed 7/24

2 stops16h 40m

$902

Lambert-St LouisPorto

STL - OPO

STLOPO

Lambert-St Louis

Tue 9/10

2 stops17h 35m

Porto

Sun 9/22

2 stops26h 39m

$950

Lambert-St LouisLisbon Humberto Delgado

STL - LIS

STLLIS

Lambert-St Louis

Wed 9/18

1 stop20h 18m

Lisbon Humberto Delgado

Thu 9/26

1 stop13h 10m

$981

Lambert-St LouisPorto

STL - OPO

STLOPO

Lambert-St Louis

Sun 9/22

2 stops23h 30m

Porto

Wed 10/2

1 stop13h 30m

$1,022

Lambert-St LouisPorto

STL - OPO

STLOPO

Lambert-St Louis

Thu 8/1

2 stops16h 20m

Porto

Fri 8/30

1 stop13h 30m

$1,137

Flights are sorted by cheapest first

Deals found on 5/2

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 May 2, 2024.
To help decide which airline to fly from St. Louis to Portugal, see what other customers have to say about Delta, Air Canada and American Airlines. 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
10,858 reviews
Check prices

Entertainment

8.0

Overall

8.1

Food

7.4

Boarding

8.2

Crew

8.6

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
10,858 reviews
Delta
8.1
Very good
10,858 reviews
Check prices

Entertainment

8.0

Overall

8.1

Food

7.4

Boarding

8.2

Crew

8.6

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.

KLM
7.9
Good
1,608 reviews
Delta
8.1
Very good
10,858 reviews
Check prices

Entertainment

8.0

Overall

8.1

Food

7.4

Boarding

8.2

Crew

8.6

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.

Air France
7.6
Good
1,792 reviews
Delta
8.1
Very good
10,858 reviews
Check prices

Entertainment

8.0

Overall

8.1

Food

7.4

Boarding

8.2

Crew

8.6

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
11,143 reviews
Delta
8.1
Very good
10,858 reviews
Check prices

Entertainment

8.0

Overall

8.1

Food

7.4

Boarding

8.2

Crew

8.6

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
14,767 reviews
Delta
8.1
Very good
10,858 reviews
Check prices

Entertainment

8.0

Overall

8.1

Food

7.4

Boarding

8.2

Crew

8.6

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 Delta for just $757, but on average you can expect to pay $886.

  • 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 $529. Users have also found prices from $546 and $878 on Delta and Lufthansa, 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 5/2.

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 Frankfurt flights
St. Louis to Heathrow flights
Kansas City to Dublin flights
Kansas City to Leonardo da Vinci/Fiumicino flights
St. Louis to Dublin flights
St. Louis to Leonardo da Vinci/Fiumicino flights
Kansas City to Athens flights
Kansas City to Gatwick flights
Kansas City to Charles de Gaulle flights
St. Louis to Amsterdam flights
St. Louis to Gatwick flights
St. Louis to Athens flights
St. Louis to Charles de Gaulle flights
St. Louis to Madrid flights
St. Louis to London City flights
Kansas City to Barcelona-El Prat flights
Kansas City to London City flights
St. Louis to Vicenza flights
Kansas City to Frankfurt flights
St. Louis to Geneva flights
Kansas City to Edinburgh flights
St. Louis to Lisbon flights
St. Louis to Sarajevo flights
St. Louis to Munich flights
St. Louis to Barcelona-El Prat flights
St. Louis to Zurich flights
Kansas City to Amsterdam flights
Kansas City to Orly flights
St. Louis to Edinburgh flights
St. Louis to Keflavik Intl flights
Kansas City to Lisbon flights
Kansas City to Madrid flights
St. Louis to Istanbul flights
St. Louis to Orly flights
Kansas City to Vicenza flights
Springfield to Heathrow flights
St. Louis to Malpensa flights
Kansas City to Keflavik Intl flights
Kansas City to Arlanda flights
St. Louis to Linate flights
Kansas City to Istanbul flights
St. Louis to Sabiha Gokcen flights
St. Louis to Berlin flights
Kansas City to Malpensa flights
Kansas City to Munich flights
Kansas City to Oslo Gardermoen flights
Kansas City to Linate flights
St. Louis to Oslo Gardermoen flights
Kansas City to Florence 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 2,899,487 searches. Data last updated May 2, 2024.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$537Average$978FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
British AirwaysCheapest$554Average$928FlexibilityNo cancel feeOn-time70%
Search British Airways flights
United AirlinesCheapest$558Average$986FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
DeltaCheapest$589Average$878FlexibilityNo 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$664Average$874FlexibilityNo cancel feeOn-time75%
Search KLM flights
Air CanadaCheapest$837Average$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 Saint Peter Jersey
Flights to Kirkwall Arpt
Flights to Skiathos
Flights to Naxos
Flights to Ningbo Lishe Intl
Flights to Edremit/Korfez
Flights to Bourgas
Flights to Bodø
Flights to Pellston Emmet County
Flights to Cornwall Newquay
Flights to Ordu/Giresun
Flights to Batumi
Flights to Mason City
Flights to Biarritz Parme
Flights to Zakynthos Dionsios Salomos
Flights to Cortez Montezuma County
Flights to Clermont-Ferrand Aulnat
Flights to Nevsehir
Flights to Hyannis Barnstable
Flights to Girona Costa Brava
Flights to Kagoshima
Flights to Perugia Sant Egidio
Flights to Oran Es Senia
Flights to Chios

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