$650 Cheap Flights from Riga (RIX) to St. Louis (STL)

View $650 flight on Sat, Apr 18, 2026Opens in a new window

Popular airlines from Riga International Airport (RIX) to St. Louis Lambert Intl. Airport (STL)

Cheap Flights from Riga to St. Louis (RIX-STL)

Prices were available within the past 7 days and start at $650 for one-way flights and $970 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Lufthansa
Sat, Nov 8 - Fri, Nov 14
RIX
Riga
STL
St. Louis
$970 Roundtrip, found 4 days ago
$970
Roundtrip
found 4 days ago
Select Lufthansa flight, departing Sat, Nov 8 from Riga to St. Louis, returning Fri, Nov 14, priced at $970 found 4 days ago
Lufthansa
Sat, Nov 8 - Fri, Nov 14
RIX
Riga
STL
St. Louis
$979 Roundtrip, found 4 days ago
$979
Roundtrip
found 4 days ago
Select Lufthansa flight, departing Sat, Nov 8 from Riga to St. Louis, returning Fri, Nov 14, priced at $979 found 4 days ago
Lufthansa
Sun, Nov 9 - Fri, Nov 14
RIX
Riga
STL
St. Louis
$989 Roundtrip, found 4 days ago
$989
Roundtrip
found 4 days ago
Select Lufthansa flight, departing Sun, Nov 9 from Riga to St. Louis, returning Fri, Nov 14, priced at $989 found 4 days ago
Lufthansa
Sat, Nov 8 - Fri, Nov 14
RIX
Riga
STL
St. Louis
$999 Roundtrip, found 4 days ago
$999
Roundtrip
found 4 days ago
Select Lufthansa flight, departing Sat, Nov 8 from Riga to St. Louis, returning Fri, Nov 14, priced at $999 found 4 days ago
Lufthansa
Sat, Nov 8 - Fri, Nov 14
RIX
Riga
STL
St. Louis
$1,008 Roundtrip, found 4 days ago
$1,008
Roundtrip
found 4 days ago
Select Lufthansa flight, departing Sat, Nov 8 from Riga to St. Louis, returning Fri, Nov 14, priced at $1,008 found 4 days ago
British Airways
Sun, Jan 18 - Sat, May 16
RIX
Riga
STL
St. Louis
$1,013 Roundtrip, found 16 hours ago
$1,013
Roundtrip
found 16 hours ago
Select British Airways flight, departing Sun, Jan 18 from Riga to St. Louis, returning Sat, May 16, priced at $1,013 found 16 hours ago
Lufthansa
Sat, Nov 8 - Fri, Nov 14
RIX
Riga
STL
St. Louis
$1,017 Roundtrip, found 4 days ago
$1,017
Roundtrip
found 4 days ago
Select Lufthansa flight, departing Sat, Nov 8 from Riga to St. Louis, returning Fri, Nov 14, priced at $1,017 found 4 days ago
Lufthansa
Sun, Nov 9 - Fri, Nov 14
RIX
Riga
STL
St. Louis
$1,022 Roundtrip, found 4 days ago
$1,022
Roundtrip
found 4 days ago
Select Lufthansa flight, departing Sun, Nov 9 from Riga to St. Louis, returning Fri, Nov 14, priced at $1,022 found 4 days ago
Austrian Airlines
Sun, Nov 9 - Fri, Nov 14
RIX
Riga
STL
St. Louis
$1,057 Roundtrip, found 4 days ago
$1,057
Roundtrip
found 4 days ago
Select Austrian Airlines flight, departing Sun, Nov 9 from Riga to St. Louis, returning Fri, Nov 14, priced at $1,057 found 4 days ago
Brussels Airlines
Sun, Nov 9 - Fri, Nov 14
RIX
Riga
STL
St. Louis
$1,601 Roundtrip, found 4 days ago
$1,601
Roundtrip
found 4 days ago
Select Brussels Airlines flight, departing Sun, Nov 9 from Riga to St. Louis, returning Fri, Nov 14, priced at $1,601 found 4 days ago

Frequently asked questions

How much does a flight from Riga Intl. Airport (RIX) to Lambert-St. Louis Intl. Airport (STL) cost?
Snag a cheap one-way flight from $650 or cheap return flight from $970 from Riga Intl. Airport (RIX) to Lambert-St. Louis Intl. Airport (STL) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Riga Intl. Airport (RIX) to Lambert-St. Louis Intl. Airport (STL)?
The cheapest month to fly from RIX to STL is November, when demand is low. Off-peak months are usually when airlines offer better prices between these airports.
What is the cheapest airline that flies from Riga Intl. Airport (RIX) to Lambert-St. Louis Intl. Airport (STL)?
To find the cheapest airline that'll fly you from RIX to STL, use Expedia's filter tool. Tailor your search based on what's important to you, such as preferred carriers and cabin class. You can then sort your results by "Price (lowest to highest)" to see the cheapest flights first.
How many flights per day from Riga Intl. Airport (RIX) to Lambert-St. Louis Intl. Airport (STL)?
You'll have to hop on a flight with a layover when traveling from Riga Intl. Airport (RIX) to Lambert-St. Louis Intl. Airport (STL). Direct flights don't operate daily on this route. However, simply filter your search to include one or two stops to find the best option for your trip.
What day of the week has the most flights from RIX to STL?
Friday is usually the busiest day for flights, while Tuesday is often the quietest.* Just remember that flight schedules can vary depending on various factors, such as the time of year and airline.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Riga Intl. Airport (RIX) to Lambert-St. Louis Intl. Airport (STL)?
Select a flight from Riga Intl. Airport (RIX) to Lambert-St. Louis Intl. Airport (STL) that leaves before 3 PM to reduce the risk of cancellations. Departures after this time have a 22% higher chance of being canceled, on average.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Riga Intl. Airport (RIX) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Booking your ticket from RIX to STL just before your trip is usually more expensive. But if you're flexible with your departure times and dates, you could snag a cheap last-minute fare.
Is it cheaper to book a RIX to STL flight and hotel package?
Opting for a RIX to STL flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your trip in one place. Select from our impressive range of accommodations and then add flights, car rentals and activities to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Riga Intl. Airport (RIX) to Lambert-St. Louis Intl. Airport (STL)?
Typically, you're able to cancel or reschedule your RIX to STL flight. However, additional fees may apply, especially if you booked more than 24 hours ago. Double-check your itinerary for the airline's fees and rules on flight changes, or if you want more information, head to our Customer Service portal.

Travel information

Origin airport
Riga Intl.
Destination airport
Lambert-St. Louis Intl.
Airlines serving
Air Canada, Austrian Airlines, British Airways, Finnair, Lufthansa
Roundtrip price
$970
Distance
4807 mi

Book with confidence

Riga to St. Louis Flights

The cheapest times to fly from Riga to St. Louis

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Riga to St. Louis are during the month of November. You can find some of the cheapest flights from Riga to St. Louis with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Riga to St. Louis

Sunday is one of the best days to book for cheap flights from Riga to St. Louis: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Riga to St. Louis

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Riga to St. Louis in 2025. You can also book with separate airlines for your outbound and return journeys, from $650 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Riga to St. Louis flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Riga to St. Louis airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Riga to St. Louis Flights

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*Available to One Key members.