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$542+ Cheap flights from St. Louis (STL) to Romania

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 12/10. Fares are subject to change and may not be available on all flights or dates of travel.
STL — OTP
Nov 13 — Nov 201
Thu 11/13
Thu 11/20
1 adult, Economy
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Find flight deals from St. Louis to Romania

Cheapest flights from St. Louis to Romania
Explore the most affordable flight options available from St. Louis to Romania. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 14, 2025.

This Justfly.com deal was found by Cheapflights users on 10/13. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/104:05 pmSTL - OTP
2 stops15h 45mMultiple Airlines
Wed 1/216:05 amOTP - STL
1 stop15h 50mMultiple Airlines
Deal found 10/13$542
This Air Canada deal was found by Cheapflights users on 10/13. 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.
Wed 12/104:05 pmSTL - OTP
2 stops15h 45mAir Canada
Wed 1/216:30 amOTP - STL
3 stops24h 28mAir Canada
Deal found 10/13$561
This Air Canada deal was found by Cheapflights users on 10/13. 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.
Wed 12/104:05 pmSTL - OTP
2 stops15h 45mAir Canada
Sat 1/176:55 amOTP - STL
3 stops22h 18mAir Canada
Deal found 10/13$575
This United deal was found by Cheapflights users on 10/13. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/101:35 pmSTL - OTP
2 stops16h 25mMultiple Airlines
Sat 1/172:50 pmOTP - STL
1 stop31h 05mMultiple Airlines
Deal found 10/13$646
This Kiwi.com deal was found by Cheapflights users on 10/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/103:50 pmSTL - OTP
1 stop14h 10mLufthansa
Wed 1/216:05 amOTP - STL
1 stop15h 50mLufthansa
Deal found 10/13$659
This United Airlines deal was found by Cheapflights users on 10/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1211:05 amSTL - SBZ
2 stops23h 10mUnited Airlines
Sun 11/162:30 pmSBZ - STL
2 stops39h 24mUnited Airlines
Deal found 10/13$693
This Kiwi.com deal was found by Cheapflights users on 10/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/103:50 pmSTL - OTP
1 stop14h 10mLufthansa
Sat 1/172:50 pmOTP - STL
1 stop31h 05mLufthansa
Deal found 10/13$754
This Cheapflightsfares deal was found by Cheapflights users on 10/12. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:35 pmSTL - SBZ
2 stops22h 15mLufthansa
Wed 1/72:30 pmSBZ - STL
2 stops17h 29mLufthansa
Deal found 10/12$778
This United Airlines deal was found by Cheapflights users on 10/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:35 pmSTL - SBZ
2 stops15h 40mUnited Airlines
Wed 1/72:30 pmSBZ - STL
3 stops28h 22mUnited Airlines
Deal found 10/12$799
This British Airways deal was found by Cheapflights users on 10/13. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/262:50 pmSTL - OTP
2 stops16h 20mBritish Airways
Fri 1/168:00 amOTP - STL
2 stops22h 44mBritish Airways
Deal found 10/13$816
This Kiwi.com deal was found by Cheapflights users on 10/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/263:50 pmSTL - OTP
1 stop14h 20mLufthansa
Fri 1/161:05 pmOTP - STL
2 stops18h 54mLufthansa
Deal found 10/13$854

Cheap flight deals from St. Louis to Romania

Keep the following information in mind while searching for St. Louis to Romania flight deals. Data was last updated October 14, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$542
(Justfly.com)

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 Romania
Search Deals
Highest demand for flights based on searches. 50% potential increase in price ($1,361 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 Romania 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 14, 2025.
Use the filters below to find and compare flights from St. Louis to Romania that are best for you.

Fly from

St. Louis

Fly to

Romania

Route

Depart

Return

Price

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Wed 12/10

4:05 pm-3:50 pm

2 stops15h 45m

Bucharest Otopeni Intl

Wed 1/21

6:05 am-1:55 pm

1 stop15h 50m

$542

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Wed 12/10

4:05 pm-3:50 pm

2 stops15h 45m

Bucharest Otopeni Intl

Sat 1/17

5:55 am-3:29 pm

2 stops41h 34m

$548

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Wed 12/10

4:05 pm-3:50 pm

2 stops15h 45m

Bucharest Otopeni Intl

Wed 1/21

6:30 am-10:58 pm

3 stops24h 28m

$561

St. LouisCluj Napoca

STL - CLJ

STLCLJ

Lambert-St Louis

Fri 3/27

8:00 am-1:40 pm

2 stops22h 40m

Cluj Napoca

Tue 3/31

6:00 am-3:24 pm

2 stops41h 24m

$640

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Fri 3/27

4:05 pm-6:35 pm

2 stops19h 30m

Bucharest Otopeni Intl

Tue 3/31

1:50 pm-3:24 pm

2 stops33h 34m

$646

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Fri 3/27

4:50 pm-2:10 pm

1 stop14h 20m

Bucharest Otopeni Intl

Tue 3/31

1:50 pm-3:24 pm

2 stops33h 34m

$653

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Wed 12/10

3:50 pm-2:00 pm

1 stop14h 10m

Bucharest Otopeni Intl

Wed 1/21

6:05 am-1:55 pm

1 stop15h 50m

$659

St. LouisSibiu

STL - SBZ

STLSBZ

Lambert-St Louis

Wed 11/12

11:05 am-6:15 pm

2 stops23h 10m

Sibiu

Sun 11/16

2:30 pm-3:29 pm

2 stops56h 59m

$693

St. LouisSibiu

STL - SBZ

STLSBZ

Lambert-St Louis

Wed 12/31

6:35 pm-12:50 am

2 stops22h 15m

Sibiu

Wed 1/7

2:30 pm-11:59 pm

2 stops17h 29m

$778

St. LouisSibiu

STL - SBZ

STLSBZ

Lambert-St Louis

Wed 12/31

6:35 pm-6:15 pm

2 stops15h 40m

Sibiu

Wed 1/7

2:30 pm-10:52 am

3 stops28h 22m

$799

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/13

Showing 1-10 of 11 results
1
2

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

Have a flexible travel schedule? Discover the best time to fly to Romania 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 Romania

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

Find hourly flight availability from St. Louis to Romania. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 14, 2025.

It’s optimal to fly from St. Louis to Romania in the evening. By choosing this option you can save up to 34% on the cost of your flight, compared to a flight in the morning.

Reviews of airlines servicing Romania

Get insights into the airlines that provide service to Romania. 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 Romania. Reviews last updated October 14, 2025.
See what other customers who have flown with Delta, United Airlines, and Air Canada from St. Louis to Romania have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,973 reviews

Entertainment

7.9

Overall

8.0

Comfort

7.9

Boarding

8.2

Food

7.3

Crew

8.5

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
8.0
Very good
7,973 reviews
Delta
8.0
Very good
7,973 reviews

Entertainment

7.9

Overall

8.0

Comfort

7.9

Boarding

8.2

Food

7.3

Crew

8.5

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.
United Airlines
7.4
Good
8,976 reviews
Delta
8.0
Very good
7,973 reviews

Entertainment

7.9

Overall

8.0

Comfort

7.9

Boarding

8.2

Food

7.3

Crew

8.5

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
10,295 reviews
Delta
8.0
Very good
7,973 reviews

Entertainment

7.9

Overall

8.0

Comfort

7.9

Boarding

8.2

Food

7.3

Crew

8.5

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
7,489 reviews
Delta
8.0
Very good
7,973 reviews

Entertainment

7.9

Overall

8.0

Comfort

7.9

Boarding

8.2

Food

7.3

Crew

8.5

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 Romania. 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 Romania?

    Lambert-St Louis (STL), located 12.7 mi from the city center, is the airport you fly out of when you book flights from St. Louis to Romania.

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

    Departing from St. Louis to Romania will take you 15h 45m. The distance from St. Louis to Romania is about 5451 mi. This flight may include one or multiple stops.

  • What are the most popular routes from St. Louis to Romania?

    The most popular flight routes from St. Louis to Romania are Lambert-St Louis - Bucharest Otopeni Intl, Lambert-St Louis - Sibiu and Lambert-St Louis - Cluj Napoca.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from St. Louis to Romania 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

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Alternative routes for St. Louis to Romania

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from St. Louis to Romania

Discover the top 2 airlines that operate flights from St. Louis to Romania. 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 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$772Average$1,068FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$784Average$960FlexibilityNo cancel feeOn-time69%

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