$436 Cheap Flights from St. Louis (STL) to Riga (RIX)

View $436 flight on Mon, Dec 1, 2025Opens in a new window

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

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

Prices were available within the past 7 days and start at $436 for one-way flights and $506 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Scandinavian Airlines
Mon, Jan 12 - Sun, Jan 25
STL
St. Louis
RIX
Riga
$506 Roundtrip, found 4 days ago
$506
Roundtrip
found 4 days ago
Select Scandinavian Airlines flight, departing Mon, Jan 12 from St. Louis to Riga, returning Sun, Jan 25, priced at $506 found 4 days ago
Delta
Mon, Dec 1 - Thu, Dec 11
STL
St. Louis
RIX
Riga
$548 Roundtrip, found 3 days ago
$548
Roundtrip
found 3 days ago
Select Delta flight, departing Mon, Dec 1 from St. Louis to Riga, returning Thu, Dec 11, priced at $548 found 3 days ago
Delta
Mon, Dec 1 - Thu, Dec 11
STL
St. Louis
RIX
Riga
$549 Roundtrip, found 3 days ago
$549
Roundtrip
found 3 days ago
Select Delta flight, departing Mon, Dec 1 from St. Louis to Riga, returning Thu, Dec 11, priced at $549 found 3 days ago
British Airways
Mon, Dec 1 - Thu, Dec 11
STL
St. Louis
RIX
Riga
$560 Roundtrip, found 3 days ago
$560
Roundtrip
found 3 days ago
Select British Airways flight, departing Mon, Dec 1 from St. Louis to Riga, returning Thu, Dec 11, priced at $560 found 3 days ago
Lufthansa
Wed, Nov 5 - Tue, Nov 11
STL
St. Louis
RIX
Riga
$563 Roundtrip, found 4 days ago
$563
Roundtrip
found 4 days ago
Select Lufthansa flight, departing Wed, Nov 5 from St. Louis to Riga, returning Tue, Nov 11, priced at $563 found 4 days ago
Lufthansa
Wed, Nov 5 - Tue, Nov 11
STL
St. Louis
RIX
Riga
$566 Roundtrip, found 4 days ago
$566
Roundtrip
found 4 days ago
Select Lufthansa flight, departing Wed, Nov 5 from St. Louis to Riga, returning Tue, Nov 11, priced at $566 found 4 days ago
Lufthansa
Wed, Nov 5 - Fri, Nov 14
STL
St. Louis
RIX
Riga
$573 Roundtrip, found 4 days ago
$573
Roundtrip
found 4 days ago
Select Lufthansa flight, departing Wed, Nov 5 from St. Louis to Riga, returning Fri, Nov 14, priced at $573 found 4 days ago
Air Canada
Tue, Nov 4 - Wed, Nov 12
STL
St. Louis
RIX
Riga
$574 Roundtrip, found 4 days ago
$574
Roundtrip
found 4 days ago
Select Air Canada flight, departing Tue, Nov 4 from St. Louis to Riga, returning Wed, Nov 12, priced at $574 found 4 days ago
Delta
Mon, Dec 1 - Thu, Dec 11
STL
St. Louis
RIX
Riga
$575 Roundtrip, found 3 days ago
$575
Roundtrip
found 3 days ago
Select Delta flight, departing Mon, Dec 1 from St. Louis to Riga, returning Thu, Dec 11, priced at $575 found 3 days ago
Lufthansa
Wed, Nov 5 - Thu, Nov 13
STL
St. Louis
RIX
Riga
$575 Roundtrip, found 4 days ago
$575
Roundtrip
found 4 days ago
Select Lufthansa flight, departing Wed, Nov 5 from St. Louis to Riga, returning Thu, Nov 13, priced at $575 found 4 days ago

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to Riga Intl. Airport (RIX) cost?
Grab a cheap one-way flight from $436 or cheap return flight from $506 from Lambert-St. Louis Intl. Airport (STL) to Riga Intl. Airport (RIX) 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 Lambert-St. Louis Intl. Airport (STL) to Riga Intl. Airport (RIX)?
The cheapest month to fly from STL to RIX is January, when there's less demand. Off-peak months are usually when you'll find cheap fares for travel between these airports.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to Riga Intl. Airport (RIX)?
Expedia's filter tool lets you easily compare airlines, flight times and baggage options all in one place. Choose your preferences, then sort by "Price (lowest to highest)" to find the carrier with the cheapest STL to RIX flight.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Riga Intl. Airport (RIX)?
You'll have to hop on a flight with a layover if you're traveling from Lambert-St. Louis Intl. Airport (STL) to Riga Intl. Airport (RIX). Direct flights don't operate daily on this route. However, just filter your search to include one or more stops to discover the best option for your trip.
What day of the week has the most flights from STL to RIX?
You'll typically find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can vary from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Lambert-St. Louis Intl. Airport (STL) to Riga Intl. Airport (RIX)?
Choose a flight from Lambert-St. Louis Intl. Airport (STL) to Riga Intl. Airport (RIX) that leaves before 3 PM to reduce the risk of cancellations. Departures after this hour 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 Lambert-St. Louis Intl. Airport (STL) to Riga Intl. Airport (RIX) last-minute?
Last-minute fares from STL to RIX are usually more expensive. To lock in the cheapest rates, start looking for flights well ahead of time. That said, if you're flexible with your travel dates, you may find a cheap fare right before you leave.
Is it cheaper to book a STL to RIX flight and hotel package?
Compared with arranging flights and hotels separately, booking a STL to RIX flight and hotel package with Expedia could lead to significant savings. Better yet, having everything in one convenient place will take the hassle out of travel planning. Just secure your flights and select from our extensive range of stays, then tailor your trip with other add-ons like activities and car rentals.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Riga Intl. Airport (RIX)?
Generally, it's possible to cancel or reschedule your STL to RIX flight. However, if it's been more than 24 hours since booking, additional charges may apply. Refer to your airline's policies in your itinerary to see what changes are possible and if any costs are involved. You'll also find more information on our Customer Service portal.

Travel information

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Riga Intl.
Airlines serving
Air Canada, Air France, Austrian Airlines, British Airways, Brussels Airlines, Delta, Finnair, KLM, Lufthansa, Scandinavian Airlines, Turkish Airlines, United
Roundtrip price
$505
Distance
4807 mi

Book with confidence

Book with confidence

St. Louis to Riga Flights

The cheapest times to fly from St. Louis to Riga

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 St. Louis to Riga are during the month of January. You can find some of the cheapest flights from St. Louis to Riga with Expedia's search tool and vast selection of airlines.

 

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

Sunday is one of the best days to book for cheap flights from St. Louis to Riga: 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 St. Louis to Riga

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 St. Louis to Riga in 2025. You can also book with separate airlines for your outbound and return journeys, from $436 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 St. Louis to Riga 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 St. Louis to Riga 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.

 

St. Louis to Riga Flights
*Available to One Key members.