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Otopeni Intl

$501+ Cheap flights from St. Louis (STL) to Otopeni Intl (OTP)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/1. Fares are subject to change and may not be available on all flights or dates of travel.
STL — OTP
Mar 16 — Mar 231
Mon 3/16
Mon 3/23
1 adult, Economy
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Cheap flight deals from St. Louis to Otopeni Intl

Cheapest flights from St. Louis to Otopeni Intl
Explore the most affordable flight options available from St. Louis to Otopeni Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 14, 2026.

This oojo deal was found by Cheapflights users on 2/11. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/195:21 pm
STL
-
OTP
2 stops23h 29m
British Airways
Tue 4/286:10 pm
OTP
-
STL
2 stops30h 31m
British Airways
Deal found 2/11$538
This United Airlines deal was found by Cheapflights users on 2/13. 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 4/89:10 am
STL
-
OTP
2 stops25h 25m
United Airlines
Wed 4/156:05 am
OTP
-
STL
1 stop15h 20m
United Airlines
Deal found 2/13$542
This FlightHub deal was found by Cheapflights users on 2/13. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/83:30 pm
STL
-
OTP
1 stop16h 50m
Lufthansa
Wed 4/156:05 am
OTP
-
STL
1 stop15h 20m
Lufthansa
Deal found 2/13$549
This American Airlines deal was found by Cheapflights users on 2/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/88:03 pm
STL
-
OTP
2 stops20h 17m
American Airlines
Wed 4/158:15 am
OTP
-
STL
2 stops22h 02m
American Airlines
Deal found 2/10$553
This oojo deal was found by Cheapflights users on 2/11. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/88:54 am
STL
-
OTP
2 stops31h 26m
British Airways
Wed 4/154:15 pm
OTP
-
STL
2 stops39h 31m
British Airways
Deal found 2/11$562

Find flight deals from St. Louis to Otopeni Intl

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Otopeni Intl (OTP). 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 February 14, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$538
(oojo)

One-way from

$501
(United Airlines)

Popular in

June

Cheapest in

November
Provider with most accurate pricing for Lambert-St Louis-Bucharest Otopeni Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Bucharest Otopeni Intl flights.
Search Deals
From Lambert-St Louis to Bucharest Otopeni Intl
Search Deals
One-way flight from Lambert-St Louis to Bucharest Otopeni Intl
Search Deals
Highest demand for flights based on searches. 25% potential increase in price ($308 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($51 potential savings vs. average RT price).
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to Otopeni Intl 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 February 14, 2026.
Use the filters below to find and compare flights from St. Louis to Bucharest Otopeni Intl Airport that are best for you.

Fly from

St. Louis

Fly to

Otopeni Intl

Route

Depart

Return

Price

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Sun 4/19

5:21 pm-12:50 am

2 stops23h 29m

Bucharest Otopeni Intl

Tue 4/28

6:10 pm-4:41 pm

2 stops30h 31m

$538

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Wed 4/8

9:10 am-6:35 pm

2 stops25h 25m

Bucharest Otopeni Intl

Wed 4/15

6:05 am-3:24 pm

2 stops17h 19m

$551

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Sun 4/19

3:30 pm-1:05 pm

1 stop13h 35m

Bucharest Otopeni Intl

Tue 4/28

6:05 am-9:08 pm

2 stops23h 03m

$553

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Wed 4/8

8:03 pm-12:20 am

2 stops20h 17m

Bucharest Otopeni Intl

Wed 4/15

8:15 am-10:17 pm

2 stops22h 02m

$553

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Wed 4/8

8:03 pm-12:20 am

2 stops20h 17m

Bucharest Otopeni Intl

Wed 4/15

8:15 am-10:59 pm

2 stops22h 44m

$555

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Wed 4/8

8:54 am-12:20 am

2 stops31h 26m

Bucharest Otopeni Intl

Wed 4/15

4:15 pm-11:46 pm

2 stops39h 31m

$562

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Wed 4/8

3:30 pm-4:20 pm

1 stop16h 50m

Bucharest Otopeni Intl

Wed 4/15

1:45 pm-10:56 pm

2 stops17h 11m

$601

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Fri 5/1

9:00 am-6:35 pm

2 stops25h 35m

$501

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Fri 5/1

10:00 am-1:10 pm

3 stops19h 10m

$582

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/10

Compare providers for flights from St. Louis to Otopeni Intl

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 Otopeni Intl in February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 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 Otopeni Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Bucharest Otopeni Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Bucharest Otopeni Intl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on St. Louis-Bucharest Otopeni Intl Airport flights, Cheapflights users trust FlightHub the most. FlightHub 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 Otopeni Intl Airport 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 Otopeni Intl

Have a flexible travel schedule? Discover the best time to fly to Otopeni Intl 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.

Reviews of airlines servicing Otopeni Intl

Get insights into the airlines that provide service to Otopeni Intl. 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 Otopeni Intl. Reviews last updated February 14, 2026.
Read reviews from past customers who have flown United Airlines and Lufthansa from St. Louis to Bucharest Otopeni Intl Airport. 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.
United Airlines
7.4
Good
9,289 reviews

Comfort

7.3

Entertainment

7.1

Overall

7.4

Food

6.6

Crew

8.1

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
United Airlines
7.4
Good
9,289 reviews
United Airlines
7.4
Good
9,289 reviews

Comfort

7.3

Entertainment

7.1

Overall

7.4

Food

6.6

Crew

8.1

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
Lufthansa
6.8
Okay
7,784 reviews
United Airlines
7.4
Good
9,289 reviews

Comfort

7.3

Entertainment

7.1

Overall

7.4

Food

6.6

Crew

8.1

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Otopeni Intl. 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 Otopeni Intl?

    Located just 12.7 mi from the city center, Lambert-St Louis is the airport most travelers will use when flying to Bucharest Otopeni Intl from St. Louis. Booking flights from Lambert-St Louis (STL) to Bucharest Otopeni Intl should be relatively easy as there are 0 daily outbound flights to Bucharest Otopeni Intl from 2 different airlines.

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

    For as low as $553, British Airways can have you in Bucharest Otopeni Intl Airport from St. Louis in 13h 35m. The distance between St. Louis and Bucharest Otopeni Intl Airport is about 5451 mi. This flight may include one or multiple stops.

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

    According to our current data, United Airlines ($707), and Lufthansa ($780) offers the cheapest pricing from St. Louis to Bucharest Otopeni Intl Airport.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from St. Louis to Otopeni Intl 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 Otopeni Intl Airport?

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

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Alternative routes for St. Louis to Otopeni Intl

See prices for flight routes from nearby airports that may be better suited for you.
Kansas City to Otopeni Intl flights
Springfield to Otopeni Intl flights
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Top 2 airlines flying from St. Louis to Otopeni Intl

Discover the top 2 airlines that operate flights from St. Louis to Otopeni Intl. 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 February 14, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$707Average$804FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$780Average$1,329FlexibilityNo cancel feeOn-time76%

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