$652 Cheap Flights from Riga (RIX) to St. Louis (STL)

View $652 flight on Fri, Sep 19, 2025Opens in a new window

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

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

Prices were available within the past 7 days and start at $652 for one-way flights and $880 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Fri, Sep 26 - Wed, Dec 3
RIX
Riga
STL
St. Louis
$880 Roundtrip, found 4 days ago
$880
Roundtrip
found 4 days ago
Select Air Canada flight, departing Fri, Sep 26 from Riga to St. Louis, returning Wed, Dec 3, priced at $880 found 4 days ago
Lufthansa
Fri, Sep 26 - Wed, Dec 3
RIX
Riga
STL
St. Louis
$897 Roundtrip, found 4 days ago
$897
Roundtrip
found 4 days ago
Select Lufthansa flight, departing Fri, Sep 26 from Riga to St. Louis, returning Wed, Dec 3, priced at $897 found 4 days ago
Air Canada
Fri, Sep 26 - Wed, Dec 3
RIX
Riga
STL
St. Louis
$909 Roundtrip, found 4 days ago
$909
Roundtrip
found 4 days ago
Select Air Canada flight, departing Fri, Sep 26 from Riga to St. Louis, returning Wed, Dec 3, priced at $909 found 4 days ago
Lufthansa
Fri, Sep 26 - Wed, Dec 3
RIX
Riga
STL
St. Louis
$911 Roundtrip, found 4 days ago
$911
Roundtrip
found 4 days ago
Select Lufthansa flight, departing Fri, Sep 26 from Riga to St. Louis, returning Wed, Dec 3, priced at $911 found 4 days ago
Air Canada
Fri, Sep 26 - Wed, Dec 3
RIX
Riga
STL
St. Louis
$915 Roundtrip, found 4 days ago
$915
Roundtrip
found 4 days ago
Select Air Canada flight, departing Fri, Sep 26 from Riga to St. Louis, returning Wed, Dec 3, priced at $915 found 4 days ago
Austrian Airlines
Fri, Sep 26 - Wed, Dec 3
RIX
Riga
STL
St. Louis
$920 Roundtrip, found 4 days ago
$920
Roundtrip
found 4 days ago
Select Austrian Airlines flight, departing Fri, Sep 26 from Riga to St. Louis, returning Wed, Dec 3, priced at $920 found 4 days ago
Air Canada
Fri, Sep 26 - Wed, Dec 3
RIX
Riga
STL
St. Louis
$920 Roundtrip, found 4 days ago
$920
Roundtrip
found 4 days ago
Select Air Canada flight, departing Fri, Sep 26 from Riga to St. Louis, returning Wed, Dec 3, priced at $920 found 4 days ago
Air Canada
Fri, Sep 26 - Wed, Dec 3
RIX
Riga
STL
St. Louis
$926 Roundtrip, found 4 days ago
$926
Roundtrip
found 4 days ago
Select Air Canada flight, departing Fri, Sep 26 from Riga to St. Louis, returning Wed, Dec 3, priced at $926 found 4 days ago
British Airways
Fri, Sep 26 - Wed, Dec 3
RIX
Riga
STL
St. Louis
$948 Roundtrip, found 4 days ago
$948
Roundtrip
found 4 days ago
Select British Airways flight, departing Fri, Sep 26 from Riga to St. Louis, returning Wed, Dec 3, priced at $948 found 4 days ago
KLM
Tue, Jun 16 - Thu, Jun 25
RIX
Riga
STL
St. Louis
$1,077 Roundtrip, found 3 days ago
$1,077
Roundtrip
found 3 days ago
Select KLM flight, departing Tue, Jun 16 from Riga to St. Louis, returning Thu, Jun 25, priced at $1,077 found 3 days ago
Flights from Riga (RIX) to St. Louis (STL)
Origin airport
Riga Intl.
Destination airport
Lambert-St. Louis Intl.
Roundtrip price
$880
Distance
4807 mi

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 September. 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 $652 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.

 

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 $652 or cheap return flight from $880 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 September, 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.

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*Available to One Key members.