Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from St. Louis to Portugal from $361

1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from St. Louis to Portugal

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
8:00 am - 10:05 amSTL  Lambert-St Louis-LIS Lisbon Humberto Delgado
20h 05m1 stop Washington, D.C. Dulles Intl
United Airlines Logo
12:50 pm - 9:52 pmLIS  Lisbon Humberto Delgado-STL Lambert-St Louis
39h 02m2 stops Montreal Pierre Elliott Trudeau Intl Newark
$575United Airlines
Sun, Nov 1 - Tue, Nov 17
Multiple Airlines Logo
4:05 pm - 9:20 amSTL  Lambert-St Louis-LIS Lisbon Humberto Delgado
11h 15m1 stop Toronto Pearson Intl
Multiple Airlines Logo
11:20 am - 3:26 pmLIS  Lisbon Humberto Delgado-STL Lambert-St Louis
34h 06m1 stop Toronto Pearson Intl
$578Multiple Airlines
Mon, Nov 30 - Wed, Dec 9
Air Canada Logo
4:05 pm - 9:20 amSTL  Lambert-St Louis-LIS Lisbon Humberto Delgado
11h 15m1 stop Toronto Pearson Intl
Air Canada Logo
12:50 pm - 12:22 pmLIS  Lisbon Humberto Delgado-STL Lambert-St Louis
29h 32m2 stops Montreal Pierre Elliott Trudeau Intl Chicago O'Hare Intl
$579Air Canada
Tue, Dec 1 - Tue, Dec 8
Air Canada Logo
4:05 pm - 9:20 amSTL  Lambert-St Louis-LIS Lisbon Humberto Delgado
11h 15m1 stop Toronto Pearson Intl
Air Canada Logo
12:50 pm - 3:43 pmLIS  Lisbon Humberto Delgado-STL Lambert-St Louis
32h 53m2 stops Montreal Pierre Elliott Trudeau Intl Chicago O'Hare Intl
$579Air Canada
Mon, Nov 2 - Tue, Nov 17
United Airlines Logo
4:05 pm - 8:55 amSTL  Lambert-St Louis-LIS Lisbon Humberto Delgado
10h 50m1 stop Toronto Pearson Intl
United Airlines Logo
8:55 am - 4:24 pmLIS  Lisbon Humberto Delgado-STL Lambert-St Louis
37h 29m2 stops Montreal Pierre Elliott Trudeau Intl Newark
$579United Airlines
Wed, Nov 25 - Thu, Dec 3
Multiple Airlines Logo
4:05 pm - 10:40 amSTL  Lambert-St Louis-LIS Lisbon Humberto Delgado
12h 35m2 stops Toronto Pearson Intl Montreal Pierre Elliott Trudeau Intl
Multiple Airlines Logo
11:20 am - 3:26 pmLIS  Lisbon Humberto Delgado-STL Lambert-St Louis
34h 06m1 stop Toronto Pearson Intl
$582Multiple Airlines
Mon, Nov 30 - Wed, Dec 9
American Airlines Logo
6:02 am - 9:05 amSTL  Lambert-St Louis-LIS Lisbon Humberto Delgado
21h 03m1 stop Philadelphia
American Airlines Logo
8:20 am - 6:17 pmLIS  Lisbon Humberto Delgado-STL Lambert-St Louis
15h 57m2 stops Madrid Barajas Chicago O'Hare Intl
$589American Airlines
Tue, Nov 3 - Wed, Nov 11
American Airlines Logo
6:02 am - 9:05 amSTL  Lambert-St Louis-LIS Lisbon Humberto Delgado
21h 03m1 stop Philadelphia
American Airlines Logo
8:20 am - 7:22 pmLIS  Lisbon Humberto Delgado-STL Lambert-St Louis
17h 02m2 stops Madrid Barajas Chicago O'Hare Intl
$589American Airlines
Tue, Nov 3 - Wed, Nov 11
British Airways Logo
1:15 pm - 12:05 pmSTL  Lambert-St Louis-LIS Lisbon Humberto Delgado
16h 50m2 stops Philadelphia London Heathrow
British Airways Logo
6:35 pm - 7:22 pmLIS  Lisbon Humberto Delgado-STL Lambert-St Louis
30h 47m2 stops London Heathrow Chicago O'Hare Intl
$606British Airways
Tue, Nov 3 - Mon, Nov 9
British Airways Logo
1:15 pm - 12:05 pmSTL  Lambert-St Louis-LIS Lisbon Humberto Delgado
16h 50m2 stops Philadelphia London Heathrow
British Airways Logo
6:35 pm - 7:22 pmLIS  Lisbon Humberto Delgado-STL Lambert-St Louis
30h 47m2 stops London Heathrow Chicago O'Hare Intl
$607British Airways
Tue, Nov 3 - Mon, Nov 9

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

United Airlines flights from St. Louis to Portugal

Our best United Airlines deals on St. Louis to Portugal flight tickets
United Airlines
Nov 1
STL8:00 amLambert-St Louis
20h 05m
1 stop
LIS10:05 amLisbon Humberto Delgado
Nov 17
LIS12:50 pmLisbon Humberto Delgado
39h 02m
2 stops
STL9:52 pmLambert-St Louis
$575
United Airlines
Dec 1
STL1:18 pmLambert-St Louis
12h 52m
2 stops
LIS8:10 amLisbon Humberto Delgado
Dec 8
LIS11:20 amLisbon Humberto Delgado
31h 02m
2 stops
STL12:22 pmLambert-St Louis
$584
United Airlines
Nov 3
STL6:00 amLambert-St Louis
20h 10m
1 stop
LIS8:10 amLisbon Humberto Delgado
Nov 11
LIS10:15 amLisbon Humberto Delgado
17h 37m
1 stop
STL9:52 pmLambert-St Louis
$595

Air Canada flights from St. Louis to Portugal

Our best Air Canada deals on St. Louis to Portugal flight tickets
Air Canada
Nov 2
STL4:05 pmLambert-St Louis
11h 15m
1 stop
LIS9:20 amLisbon Humberto Delgado
Nov 17
LIS12:50 pmLisbon Humberto Delgado
32h 53m
2 stops
STL3:43 pmLambert-St Louis
$579
Air Canada
Nov 25
STL9:40 amLambert-St Louis
15h 15m
2 stops
LIS6:55 amLisbon Humberto Delgado
Dec 3
LIS10:55 amLisbon Humberto Delgado
31h 27m
2 stops
STL12:22 pmLambert-St Louis
$583
Air Canada
Nov 2
STL10:53 amLambert-St Louis
16h 27m
2 stops
LIS9:20 amLisbon Humberto Delgado
Nov 17
LIS11:20 amLisbon Humberto Delgado
34h 23m
2 stops
STL3:43 pmLambert-St Louis
$588

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisLisbon

STL Lambert-St Louis - LIS Lisbon Humberto Delgado

STLLIS

Lambert-St Louis

Sun 11/1

8:00 am-10:05 am

1 stop20h 05m

Lisbon Humberto Delgado

Tue 11/17

12:50 pm-9:52 pm

2 stops39h 02m

$575

St. LouisLisbon

STL Lambert-St Louis - LIS Lisbon Humberto Delgado

STLLIS

Lambert-St Louis

Mon 11/30

4:05 pm-9:20 am

1 stop11h 15m

Lisbon Humberto Delgado

Wed 12/9

11:20 am-3:26 pm

1 stop34h 06m

$578

St. LouisLisbon

STL Lambert-St Louis - LIS Lisbon Humberto Delgado

STLLIS

Lambert-St Louis

Tue 12/1

4:05 pm-9:20 am

1 stop11h 15m

Lisbon Humberto Delgado

Tue 12/8

12:50 pm-12:22 pm

2 stops29h 32m

$579

St. LouisLisbon

STL Lambert-St Louis - LIS Lisbon Humberto Delgado

STLLIS

Lambert-St Louis

Mon 11/2

4:05 pm-9:20 am

1 stop11h 15m

Lisbon Humberto Delgado

Tue 11/17

12:50 pm-3:43 pm

2 stops32h 53m

$579

St. LouisLisbon

STL Lambert-St Louis - LIS Lisbon Humberto Delgado

STLLIS

Lambert-St Louis

Wed 11/25

4:05 pm-8:55 am

1 stop10h 50m

Lisbon Humberto Delgado

Thu 12/3

8:55 am-4:24 pm

2 stops37h 29m

$579

St. LouisLisbon

STL Lambert-St Louis - LIS Lisbon Humberto Delgado

STLLIS

Lambert-St Louis

Mon 11/30

4:05 pm-10:40 am

2 stops12h 35m

Lisbon Humberto Delgado

Wed 12/9

11:20 am-3:26 pm

1 stop34h 06m

$582
Quickest round-trip

St. LouisLisbon

STL Lambert-St Louis - LIS Lisbon Humberto Delgado

STLLIS

Lambert-St Louis

Tue 11/3

6:02 am-9:05 am

1 stop21h 03m

Lisbon Humberto Delgado

Wed 11/11

8:20 am-6:17 pm

2 stops15h 57m

$589

St. LouisLisbon

STL Lambert-St Louis - LIS Lisbon Humberto Delgado

STLLIS

Lambert-St Louis

Tue 11/3

6:02 am-9:05 am

1 stop21h 03m

Lisbon Humberto Delgado

Wed 11/11

8:20 am-7:22 pm

2 stops17h 02m

$589

St. LouisLisbon

STL Lambert-St Louis - LIS Lisbon Humberto Delgado

STLLIS

Lambert-St Louis

Tue 11/3

1:15 pm-12:05 pm

2 stops16h 50m

Lisbon Humberto Delgado

Mon 11/9

6:35 pm-7:22 pm

2 stops30h 47m

$606

St. LouisLisbon

STL Lambert-St Louis - LIS Lisbon Humberto Delgado

STLLIS

Lambert-St Louis

Tue 11/3

1:15 pm-12:05 pm

2 stops16h 50m

Lisbon Humberto Delgado

Mon 11/9

6:35 pm-7:22 pm

2 stops30h 47m

$607

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to Portugal from

How to get the cheapest flight ticket from St. Louis to Portugal

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Portugal?

The cheapest month to fly to Portugal from St. Louis is in February. Flight prices, which tend to average around $520, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of February, then book flights to Portugal from St. Louis during April instead. Flights to Portugal in April, while not as cheap as those in February, still average around $602.

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

You are more likely to see cheaper flights to Portugal from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Portugal for around $1,113 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Portugal from St. Louis for as low as $594 on momondo.

Can stopping save me money on St. Louis to Portugal flights?

You could potentially save up to 34% on your flight if you consider stops on a St. Louis to Portugal flight.

Cheap St. Louis to Portugal flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Portugal

Best Price Found

$361

Fastest flight time

11h 15m

Direct flights

None
The best one-way flight to Portugal from St. Louis in the past 72 hours is $361. The best round-trip flight deal from St. Louis to Portugal found on momondo in the last 72 hours is $575.
The fastest flight from St. Louis to Portugal takes 11h 15m
There are no direct flights from St. Louis to Portugal. There are no popular flight routes from St. Louis to Portugal.
Search flight deals

Frequently asked questions about flying from St. Louis to Portugal

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Portugal?

    Prices for flights from Lambert-St Louis Airport to Portugal are refreshed on a daily basis.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Portugal?

  • How old do you have to be to fly from Lambert-St Louis Airport to Portugal?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis Airport to Portugal.

  • What documentation or ID do you need to fly to Portugal?

    The travel and health documents you'll need for your trip to Portugal may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Portugal. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from St. Louis to Portugal

Compare and see reviews for airlines that fly from St. Louis to Portugal with momondo
Airline
Rating
Free Cancellation
Price
LufthansaPriceFrom $493Free CancellationRating
6.8
8,238 reviews
Search Lufthansa flights
American AirlinesPriceFrom $502Free CancellationRating
7.0
12,075 reviews
Search American Airlines flights
DeltaPriceFrom $558Free CancellationRating
7.8
8,590 reviews
Search Delta flights
British AirwaysPriceFrom $574Free CancellationRating
6.7
8,227 reviews
Search British Airways flights
United AirlinesPriceFrom $588Free CancellationRating
7.4
10,226 reviews
Search United Airlines flights
Air CanadaPriceFrom $649Free CancellationRating
7.1
11,668 reviews
Search Air Canada flights

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Portugal?

It is quick and easy to find St. Louis to Portugal flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Portugal that suits you.

Can I find flights from St. Louis to Portugal with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for St. Louis to Portugal flights to just show those with flexible booking policies.

How can momondo help me find flights from St. Louis to Portugal?

Once you have performed a search for St. Louis to Portugal flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from St. Louis to Portugal right now. Can momondo alert me if prices change?

If you are not ready to book a flight from St. Louis to Portugal now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Portugal and let you know when they change.

An easier way to manage your Portugal trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Fri 10/23
Fri 10/30
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Portugal

Popular cities in Portugal

Flights to Lisbonfrom $454
Flights to Portofrom $470
Flights to Funchalfrom $485
Flights to Farofrom $463
Flights to Ponta Delgadafrom $561
Flights to Lajesfrom $568
Flights to Hortafrom $591
Flights to Pico Islandfrom $592
Flights to Porto Santofrom $999
Flights to Velasfrom $590