$439 Cheap Flights from St. Louis (STL) to Bucharest (OTP)

View $439 flight on Sat, Dec 6, 2025Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Henri Coanda Intl. Airport (OTP)

Cheap Flights from St. Louis to Bucharest (STL-OTP)

Prices were available within the past 7 days and start at $439 for one-way flights and $537 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Mon, Dec 8 - Wed, Dec 24
STL
St. Louis
OTP
Bucharest
$537 Roundtrip, found 15 hours ago
$537
Roundtrip
found 15 hours ago
Select United flight, departing Mon, Dec 8 from St. Louis to Bucharest, returning Wed, Dec 24, priced at $537 found 15 hours ago
Air Canada
Sat, Dec 6 - Wed, Dec 24
STL
St. Louis
OTP
Bucharest
$541 Roundtrip, found 15 hours ago
$541
Roundtrip
found 15 hours ago
Select Air Canada flight, departing Sat, Dec 6 from St. Louis to Bucharest, returning Wed, Dec 24, priced at $541 found 15 hours ago
Air Canada
Wed, Jan 14 - Wed, Jan 21
STL
St. Louis
OTP
Bucharest
$542 Roundtrip, found 5 days ago
$542
Roundtrip
found 5 days ago
Select Air Canada flight, departing Wed, Jan 14 from St. Louis to Bucharest, returning Wed, Jan 21, priced at $542 found 5 days ago
Lufthansa
Sat, Jan 17 - Sat, Jan 24
STL
St. Louis
OTP
Bucharest
$544 Roundtrip, found 4 hours ago
$544
Roundtrip
found 4 hours ago
Select Lufthansa flight, departing Sat, Jan 17 from St. Louis to Bucharest, returning Sat, Jan 24, priced at $544 found 4 hours ago
Lufthansa
Sat, Jan 17 - Sat, Jan 24
STL
St. Louis
OTP
Bucharest
$545 Roundtrip, found 4 hours ago
$545
Roundtrip
found 4 hours ago
Select Lufthansa flight, departing Sat, Jan 17 from St. Louis to Bucharest, returning Sat, Jan 24, priced at $545 found 4 hours ago
Lufthansa
Sat, Jan 17 - Sat, Jan 24
STL
St. Louis
OTP
Bucharest
$546 Roundtrip, found 4 hours ago
$546
Roundtrip
found 4 hours ago
Select Lufthansa flight, departing Sat, Jan 17 from St. Louis to Bucharest, returning Sat, Jan 24, priced at $546 found 4 hours ago
United
Fri, Nov 28 - Sun, Dec 7
STL
St. Louis
OTP
Bucharest
$547 Roundtrip, found 17 hours ago
$547
Roundtrip
found 17 hours ago
Select United flight, departing Fri, Nov 28 from St. Louis to Bucharest, returning Sun, Dec 7, priced at $547 found 17 hours ago
Lufthansa
Sat, Jan 17 - Sat, Jan 24
STL
St. Louis
OTP
Bucharest
$548 Roundtrip, found 4 hours ago
$548
Roundtrip
found 4 hours ago
Select Lufthansa flight, departing Sat, Jan 17 from St. Louis to Bucharest, returning Sat, Jan 24, priced at $548 found 4 hours ago
Delta
Mon, Dec 8 - Thu, Dec 25
STL
St. Louis
OTP
Bucharest
$548 Roundtrip, found 15 hours ago
$548
Roundtrip
found 15 hours ago
Select Delta flight, departing Mon, Dec 8 from St. Louis to Bucharest, returning Thu, Dec 25, priced at $548 found 15 hours ago
British Airways
Sat, Jan 17 - Sat, Jan 24
STL
St. Louis
OTP
Bucharest
$552 Roundtrip, found 4 hours ago
$552
Roundtrip
found 4 hours ago
Select British Airways flight, departing Sat, Jan 17 from St. Louis to Bucharest, returning Sat, Jan 24, priced at $552 found 4 hours ago

Alternative airports near Bucharest

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

Select flight to Henri Coanda Intl. OTP. Cheapest option available. Average driving time to city center is 19 minutes. Flights from $755
OTP
Henri Coanda Intl.
Cheapest
Average driving time to city center19 min
Flights from $755

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to Henri Coanda Intl. Airport (OTP) cost?
Lock in a cheap one-way flight from $439 or cheap return flight from $537 from Lambert-St. Louis Intl. Airport (STL) to Henri Coanda Intl. Airport (OTP) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Lambert-St. Louis Intl. Airport (STL) to Henri Coanda Intl. Airport (OTP)?
December is the most affordable month to fly from STL to OTP. Avoiding peak travel times is often the key to finding a great deal.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to Henri Coanda Intl. Airport (OTP)?
To find the cheapest airline that'll fly you from STL to OTP, use Expedia's filter tool. Tailor your search based on your travel needs, such as preferred carriers and seat class. You can then sort your results by "Price (lowest to highest)" to see the cheapest flights first.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Henri Coanda Intl. Airport (OTP)?
There aren't any daily direct flights departing from Lambert-St. Louis Intl. Airport (STL) to Henri Coanda Intl. Airport (OTP). But you can opt for flights with layovers. Filter your search on Expedia to include one or more stops, and you'll be cruising above the clouds in no time.
What day of the week has the most flights from STL to OTP?
Friday is usually the busiest day for flights, while Tuesday tends to be the quietest.* Just remember that flight schedules can change based on various factors, such as the time of year and carrier.*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 Henri Coanda Intl. Airport (OTP)?
To reach Henri Coanda Intl. Airport (OTP) without delays, pick a flight that leaves Lambert-St. Louis Intl. Airport (STL) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this time.**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 Henri Coanda Intl. Airport (OTP) last-minute?
Last-minute bookings from STL to OTP are usually more expensive. To secure the lowest prices, start searching for flights as early as possible. That being said, if you can play around with your travel dates, you may score a cheap fare right before you leave.
Is it cheaper to book a STL to OTP flight and hotel package?
You can save money by booking a STL to OTP flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's simple to manage it all in one place. After choosing your ideal accommodations and flights, consider adding extras like activities, car rentals and tours.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Henri Coanda Intl. Airport (OTP)?
Typically, you're able to reschedule or cancel your STL to OTP flight. However, there may be additional charges, especially if you booked more than 24 hours ago. Double-check your itinerary for the airline's fees and guidelines on flight changes, or if you want further details, head to our Customer Service portal.

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Henri Coanda Intl.
Airlines serving
Air Canada, American Airlines, Austrian Airlines, British Airways, Delta, KLM, Lufthansa, United
Roundtrip price
$536
Distance
5454 mi

Book with confidence

St. Louis to Bucharest Flights

The cheapest times to fly from St. Louis to Bucharest

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

 

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

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

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 Bucharest in 2025. You can also book with separate airlines for your outbound and return journeys, from $439 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 Bucharest 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 Bucharest 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 Bucharest Flights

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*Available to One Key members.