$305 Cheap Flights from St. Louis (STL) to Riga (RIX)

View $305 flight on Wed, Oct 21, 2026Opens in a new window

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

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

Prices were available within the past 7 days and start at $305 for one-way flights and $645 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

British Airways
Wed, Oct 21 - Wed, Oct 28
STL
St. Louis
RIX
Riga
$645 Roundtrip, found 2 days ago
$645
Roundtrip
found 2 days ago
Select British Airways flight, departing Wed, Oct 21 from St. Louis to Riga, returning Wed, Oct 28, priced at $645 found 2 days ago
Air Canada
Wed, Aug 19 - Wed, Aug 26
STL
St. Louis
RIX
Riga
$683 Roundtrip, found 6 days ago
$683
Roundtrip
found 6 days ago
Select Air Canada flight, departing Wed, Aug 19 from St. Louis to Riga, returning Wed, Aug 26, priced at $683 found 6 days ago
Air Canada
Wed, Aug 19 - Wed, Aug 26
STL
St. Louis
RIX
Riga
$685 Roundtrip, found 6 days ago
$685
Roundtrip
found 6 days ago
Select Air Canada flight, departing Wed, Aug 19 from St. Louis to Riga, returning Wed, Aug 26, priced at $685 found 6 days ago
United
Wed, Aug 19 - Wed, Aug 26
STL
St. Louis
RIX
Riga
$689 Roundtrip, found 6 days ago
$689
Roundtrip
found 6 days ago
Select United flight, departing Wed, Aug 19 from St. Louis to Riga, returning Wed, Aug 26, priced at $689 found 6 days ago
Lufthansa
Wed, Aug 19 - Wed, Aug 26
STL
St. Louis
RIX
Riga
$690 Roundtrip, found 6 days ago
$690
Roundtrip
found 6 days ago
Select Lufthansa flight, departing Wed, Aug 19 from St. Louis to Riga, returning Wed, Aug 26, priced at $690 found 6 days ago
British Airways
Wed, Oct 21 - Wed, Oct 28
STL
St. Louis
RIX
Riga
$690 Roundtrip, found 2 days ago
$690
Roundtrip
found 2 days ago
Select British Airways flight, departing Wed, Oct 21 from St. Louis to Riga, returning Wed, Oct 28, priced at $690 found 2 days ago
United
Wed, Aug 19 - Wed, Aug 26
STL
St. Louis
RIX
Riga
$693 Roundtrip, found 6 days ago
$693
Roundtrip
found 6 days ago
Select United flight, departing Wed, Aug 19 from St. Louis to Riga, returning Wed, Aug 26, priced at $693 found 6 days ago
United
Wed, Aug 19 - Wed, Aug 26
STL
St. Louis
RIX
Riga
$694 Roundtrip, found 6 days ago
$694
Roundtrip
found 6 days ago
Select United flight, departing Wed, Aug 19 from St. Louis to Riga, returning Wed, Aug 26, priced at $694 found 6 days ago
British Airways
Thu, Oct 22 - Wed, Oct 28
STL
St. Louis
RIX
Riga
$695 Roundtrip, found 3 days ago
$695
Roundtrip
found 3 days ago
Select British Airways flight, departing Thu, Oct 22 from St. Louis to Riga, returning Wed, Oct 28, priced at $695 found 3 days ago
American Airlines
Wed, Aug 19 - Wed, Aug 26
STL
St. Louis
RIX
Riga
$757 Roundtrip, found 6 days ago
$757
Roundtrip
found 6 days ago
Select American Airlines flight, departing Wed, Aug 19 from St. Louis to Riga, returning Wed, Aug 26, priced at $757 found 6 days ago

Alternative airports near Riga

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Riga Intl. RIX. Cheapest and Closest option available. Average driving time to city center is 18 minutes. Flights from $1,654
RIX
Riga Intl.
CheapestClosest
Average driving time to city center18 min
Flights from $1,654

Frequently asked questions

How much does a flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Riga (RIX-Riga Intl.) cost?
You can find cheap one-way flights from $305 and cheap return flights from $645 St. Louis, MO (STL-Lambert-St. Louis Intl.) to Riga (RIX-Riga Intl.) with Expedia. One-way flights typically cost between $661 and $2964, and return flights often range between $571 and $4399. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when St. Louis, MO (STL-Lambert-St. Louis Intl.) to Riga (RIX-Riga Intl.) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Riga (RIX-Riga Intl.)?
The cheapest month to fly from STL to RIX is October when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you're able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Riga (RIX-Riga Intl.)?
Enter STL to RIX and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Riga (RIX-Riga Intl.)?
KLM is one of the cheapest airlines offering connecting flights from Lambert-St. Louis Intl. (STL) to Riga Intl. (RIX), with round-trip tickets starting from around $571. This flight includes a layover in Hartsfield-Jackson Atlanta Intl. (ATL). Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Riga (RIX-Riga Intl.)?
To find a cheap flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Riga (RIX-Riga Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Riga (RIX-Riga Intl.)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
What is the earliest flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Riga (RIX-Riga Intl.)?
The earliest flight from Lambert-St. Louis International Airport (STL) to Riga International Airport (RIX) usually departs at around 5:00 AM, operated by United and Lufthansa. This seasonal service is active in August, giving you a great start to your journey to Latvia. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Riga (RIX-Riga Intl.)?
The most popular departure times for flights from St. Louis (STL) to Riga (RIX) are in the late morning, from 9am to noon. About 32% of passengers prefer this time window. Many major carriers, including Delta, United Airlines, and Lufthansa, offer flights during this window. This timing works well because it allows you to start your day early and arrive in Riga with plenty of time to explore.
How long does it take to fly from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Riga (RIX-Riga Intl.)?
Flying from STL to RIX with a connection usually takes about 14 hours, traveling roughly 4,808 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Riga (RIX-Riga Intl.)?
Business class seats are offered on the STL to RIX route. Airlines that offer business class service on this route include:

  • Lufthansa
  • United Airlines
  • Delta Air Lines

How do I earn miles on a St. Louis, MO (STL-Lambert-St. Louis Intl.) to Riga (RIX-Riga Intl.) flight with Expedia?
It's easy to earn miles on a St. Louis, MO (STL-Lambert-St. Louis Intl.) to Riga (RIX-Riga Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Riga from Lambert-St. Louis Intl. (STL)?
If you're planning to travel to Riga from Lambert-St. Louis Intl. (STL), you can fly into Riga Intl. (RIX) Some flights may connect through major hubs like Hartsfield-Jackson Atlanta Intl. (ATL), O'Hare Intl. (ORD), Washington Dulles Intl. (IAD) before reaching Riga. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Riga (RIX-Riga Intl.) at the last minute?
Typically, booking a last minute flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Riga (RIX-Riga Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a St. Louis, MO (STL-Lambert-St. Louis Intl.) to Riga (RIX-Riga Intl.) flight and hotel package?
Securing a St. Louis, MO (STL-Lambert-St. Louis Intl.) to Riga (RIX-Riga Intl.) Latvia Vacation Packages is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to Riga (RIX-Riga Intl.)?
If you booked your St. Louis, MO (STL-Lambert-St. Louis Intl.) to Riga (RIX-Riga Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Riga Intl.
Airlines serving
Air Canada, Air France, American Airlines, Austrian Airlines, British Airways, Delta, Finnair, KLM, Lufthansa, Scandinavian Airlines, United
Roundtrip price
$645
Distance
4807 mi

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 October. 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 2026. You can also book with separate airlines for your outbound and return journeys, from $305 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

*Flight schedules are subject to change.

*Available to One Key members.