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Bucharest

$547+ Cheap flights from St. Louis (STL) to Bucharest (BUH)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/9. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BUH
Nov 26 — Dec 31
Wed 11/26
Wed 12/3
1 adult, Economy
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Find flight deals from St. Louis to Bucharest

Cheapest flights from St. Louis to Bucharest
Explore the most affordable flight options available from St. Louis to Bucharest. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 27, 2025.

This Expedia deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/96:42 pmSTL - OTP
2 stops22h 23mLufthansa
Tue 12/165:55 amOTP - STL
2 stops25h 47mLufthansa
Deal found 10/25$547
This Air Canada deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/94:05 pmSTL - OTP
2 stops24h 25mMultiple Airlines
Tue 12/165:55 amOTP - STL
3 stops21h 22mMultiple Airlines
Deal found 10/25$841
This Air Canada deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/96:42 pmSTL - OTP
3 stops33h 48mAir Canada
Tue 12/165:55 amOTP - STL
3 stops21h 22mAir Canada
Deal found 10/25$1,148
This Expedia deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/264:05 pmSTL - OTP
2 stops24h 10mMultiple Airlines
Sun 11/27:35 amOTP - STL
2 stops24h 21mMultiple Airlines
Deal found 10/25$7,813
This Lufthansa deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/266:43 pmSTL - OTP
2 stops16h 52mLufthansa
Sun 11/25:55 amOTP - STL
1 stop16h 00mLufthansa
Deal found 10/25$10,180

Cheap flight deals from St. Louis to Bucharest

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Bucharest (BUH). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated October 27, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$547
(Expedia)

Popular in

March

Cheapest in

November

Average price

$1,266
Provider with most accurate pricing for Lambert-St Louis-Bucharest (BUH) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Bucharest (BUH) flights.
Search Deals
From Lambert-St Louis to Bucharest (BUH)
Search Deals
Highest demand for flights based on searches. 50% potential increase in price ($1,354 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 32% potential price decrease ($323 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to Bucharest that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 27, 2025.
Use the filters below to find and compare flights from St. Louis to Bucharest that are best for you.

Fly from

St. Louis

Fly to

Bucharest

Route

Depart

Return

Price

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Fri 3/27

5:00 am-12:30 pm

2 stops24h 30m

Bucharest Otopeni Intl

Tue 3/31

6:00 am-3:21 pm

2 stops17h 21m

$669

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Fri 3/27

4:50 pm-6:35 pm

2 stops18h 45m

Bucharest Otopeni Intl

Tue 3/31

1:50 pm-1:30 pm

1 stop31h 40m

$691

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Tue 12/9

6:42 pm-1:05 am

2 stops22h 23m

Bucharest Otopeni Intl

Tue 12/16

2:50 pm-1:55 pm

1 stop31h 05m

$715

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Tue 12/9

4:05 pm-12:30 am

2 stops24h 25m

Bucharest Otopeni Intl

Tue 12/16

5:55 am-7:17 pm

3 stops21h 22m

$841

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Tue 12/9

6:42 pm-12:30 pm

3 stops33h 48m

Bucharest Otopeni Intl

Tue 12/16

5:55 am-7:17 pm

3 stops21h 22m

$1,148

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/26

Compare providers for flights from St. Louis to Bucharest

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Bucharest in October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on St. Louis-Bucharest flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on St. Louis-Bucharest flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from St. Louis-Bucharest flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on St. Louis-Bucharest flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Bucharest flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from St. Louis to Bucharest

Have a flexible travel schedule? Discover the best time to fly to Bucharest from St. Louis with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Bucharest

What is the cheapest time of day to fly from STL to BUH?

Find hourly flight availability from St. Louis to Bucharest. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 27, 2025.

When flying from St. Louis to Bucharest, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 15% versus a flight in the afternoon.

Reviews of airlines servicing Bucharest

Get insights into the airlines that provide service to Bucharest. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Bucharest. Reviews last updated October 27, 2025.
Read reviews from past customers who have flown Delta, Air Canada, and Lufthansa from St. Louis to Bucharest. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
7,996 reviews

Crew

8.5

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Overall

7.9

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Delta
7.9
Good
7,996 reviews
Delta
7.9
Good
7,996 reviews

Crew

8.5

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Overall

7.9

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Air Canada
7.1
Good
10,370 reviews
Delta
7.9
Good
7,996 reviews

Crew

8.5

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Overall

7.9

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Lufthansa
6.8
Okay
7,532 reviews
Delta
7.9
Good
7,996 reviews

Crew

8.5

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Overall

7.9

Food

7.3

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Bucharest. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from St. Louis to Bucharest?

    Most people fly from Lambert-St Louis (STL) if they book a flight from St. Louis to Bucharest. On average, Lambert-St Louis has 0 outbound flights to Bucharest per day from 2 airlines. Lambert-St Louis is conveniently located just 12.7 mi from St. Louis’s city center.

  • How long is the flight from St. Louis to Bucharest?

    There are many flights that can get you from St. Louis to Bucharest in 18h 45m. Fly via United Airlines or Lufthansa to get the fastest option. The distance from St. Louis to Bucharest is about 5451 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from St. Louis to Bucharest round-trip?

    Currently priced at $780, Lufthansa will fly you from St. Louis to Bucharest and back. In addition to Lufthansa, many other airlines offer competitively priced options for your trip. Check Cheapflights for deals on United Airlines for as low as $784. You may be able to fly from St. Louis to Bucharest for 40% less than the average price by searching for these airlines.

  • Can I find deals for flights from St. Louis to Bucharest that include hotel bookings?

    Yes. In addition to deals on St. Louis to Bucharest flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Bucharest?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Bucharest.

  • Can I find deals for business class flights from St. Louis to Bucharest?

    Yes. Cheapflights offers flight deals from St. Louis to Bucharest by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Traveling to a place near Bucharest?

Book flights to Bucharest if you plan to visit one of these locations
Otopeni

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Top 2 airlines flying from St. Louis to Bucharest

Discover the top 2 airlines that operate flights from St. Louis to Bucharest. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 27, 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$780Average$1,055FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$784Average$960FlexibilityNo cancel feeOn-time69%

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