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

Currently, August is the cheapest month in which you can book a flight from Porto to St. Louis (average of $311). Flying from Porto 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.

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

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

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

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

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

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

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

Yes. Cheapflights offers flight deals from Porto 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.

$430+ Flights from Porto to St. Louis

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Cheap flight deals from Porto to St. Louis

Round-trip from	$1,924 (Lufthansa)
One-way from	$430 (Kiwi.com)

From Porto to Lambert-St Louis

Search Deals

One-way flight from Porto to Lambert-St Louis

Search Deals

Find flight deals from Porto to St. Louis

Best flights from Porto to St. Louis
Discover carefully curated flight deals from Porto to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 20, 2024.

Sat 1/46:15 amOPO - STL

2 stops21h 30mLufthansa

Wed 1/83:45 pmSTL - OPO

1 stop13h 55mLufthansa

Deal found 12/19

$1,924

Sat 1/412:55 pmOPO - STL

3 stops29h 01mMultiple Airlines

Wed 1/812:15 pmSTL - OPO

3 stops20h 50mMultiple Airlines

Deal found 12/19

$2,161

Last-minute flights from Porto to St. Louis
Discover last-minute flight deals from Porto to St. Louis. Data last updated December 20, 2024 and is based on user searches.

Sat 1/46:15 amOPO - STL

2 stops21h 30mLufthansa

Wed 1/83:45 pmSTL - OPO

1 stop13h 55mLufthansa

Deal found 12/19

$1,924

Sat 1/412:55 pmOPO - STL

3 stops29h 01mMultiple Airlines

Wed 1/812:15 pmSTL - OPO

3 stops20h 50mMultiple Airlines

Deal found 12/19

$2,161

One-way flights from Porto to St. Louis
Search for one-way flight options from Porto to St. Louis. Find affordable one-way fares based on user searches. Data last updated December 20, 2024.

Tue 1/216:55 amOPO - STL

3 stops46h 36mMultiple Airlines

Deal found 12/19

$430

Tue 1/218:20 amOPO - STL

2 stops30h 34mIberia

Deal found 12/19

$626

Tue 1/214:30 pmOPO - STL

1 stop27h 25mLufthansa

Deal found 12/19

$907

Find flights from Porto to St. Louis within your budget

Fly from

Fly to

Route

Depart

Return

Price

PortoSt. Louis

OPO - STL

OPOSTL

Porto

Sat 1/4

6:15 am-9:45 pm

2 stops21h 30m

Lambert-St Louis

Wed 1/8

3:45 pm-11:40 am

1 stop13h 55m

$1,924

PortoSt. Louis

OPO - STL

OPOSTL

Porto

Sat 1/4

12:55 pm-11:56 am

3 stops29h 01m

Lambert-St Louis

Wed 1/8

12:15 pm-3:05 pm

3 stops20h 50m

$2,161

PortoSt. Louis

OPO - STL

OPOSTL

Porto

Tue 1/21

6:55 am-11:31 pm

3 stops46h 36m

$430

PortoSt. Louis

OPO - STL

OPOSTL

Porto

Tue 1/21

8:20 am-8:54 am

2 stops30h 34m

$626

PortoSt. Louis

OPO - STL

OPOSTL

Porto

Tue 1/21

4:30 pm-1:55 pm

1 stop27h 25m

$907

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/19

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

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

Travel insights for flights from Porto to St. Louis

Get recent, data-driven insights about flights from Porto to St. Louis including ideal travel times, pricing trends, and more.

Rainfall in St. Louis by month

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.

Temperature in St. Louis by month

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).

Reviews of airlines servicing St. Louis

Iberia

7.0

Good

2,655 reviews

Reviews

1 / 10

I would have room to move and put my foot on the floor when the person in front of me dropped back their seat.

Iberia

7.0

Good

2,655 reviews

Iberia

7.0

Good

2,655 reviews

Reviews

1 / 10

I would have room to move and put my foot on the floor when the person in front of me dropped back their seat.

Lufthansa

6.8

Okay

7,091 reviews

Iberia

7.0

Good

2,655 reviews

Reviews

1 / 10

I would have room to move and put my foot on the floor when the person in front of me dropped back their seat.

Related info for your journey

Can I find deals for flights from Porto to St. Louis that include hotel bookings?
Yes. In addition to deals on Porto to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Porto to St. Louis?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Porto to St. Louis.
Can I find deals for business class flights from Porto to St. Louis?
Yes. Cheapflights offers flight deals from Porto 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 Porto to St. Louis?
Currently, August is the cheapest month in which you can book a flight from Porto to St. Louis (average of $311). Flying from Porto 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.

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$430+ Cheap flights from Porto (OPO) 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 1/21. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Porto 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 Porto to St. Louis

Round-trip from

One-way from

Find flight deals from Porto to St. Louis

Best flights from Porto to St. LouisDiscover carefully curated flight deals from Porto to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 20, 2024.

Discover carefully curated flight deals from Porto to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 20, 2024.

Find flights from Porto to St. Louis within your budget

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

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

Travel insights for flights from Porto to St. Louis

Get recent, data-driven insights about flights from Porto to St. Louis including ideal travel times, pricing trends, and more.

Rainfall in St. Louis by month

Plan your trip to St. Louis by taking into account the average rainfall totals by month.

Temperature in St. Louis by month

Plan your trip to St. Louis by taking into account the average temperature totals by month.

Reviews of airlines servicing St. Louis

Related info for your journey

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

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

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

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

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

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 Porto to St. Louis

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Best flights from Porto to St. Louis
Discover carefully curated flight deals from Porto to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 20, 2024.