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Otopeni Intl

$473+ 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 9/27. Fares are subject to change and may not be available on all flights or dates of travel.
STL — OTP
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
1 adult, Economy
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Cheap 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 August 14, 2025.

Round-trip from

$588
(Kiwi.com)

One-way from

$473
(Ovago)

Popular in

November

Cheapest in

September

Average price

$1,027
From Lambert-St Louis to Bucharest Otopeni Intl
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One-way flight from Lambert-St Louis to Bucharest Otopeni Intl
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Highest demand for flights based on searches. 11% potential increase in price ($136 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($32 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find 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 August 14, 2025.

This Kiwi.com deal was found by Cheapflights users on 8/13. 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 11/193:50 pmSTL - OTP
1 stop14h 10mLufthansa
Wed 11/266:05 amOTP - STL
1 stop15h 50mLufthansa
Deal found 8/13$588
This Gotogate deal was found by Cheapflights users on 8/13. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/164:05 pmSTL - OTP
2 stops15h 45mMultiple Airlines
Mon 11/247:10 pmOTP - STL
2 stops52h 19mMultiple Airlines
Deal found 8/13$605
This Gurufare deal was found by Cheapflights users on 8/13. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/163:23 pmSTL - OTP
2 stops15h 32mBritish Airways
Tue 11/258:00 amOTP - STL
2 stops22h 29mBritish Airways
Deal found 8/13$611
This KAYAK deal was found by Cheapflights users on 8/13. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/163:50 pmSTL - OTP
1 stop18h 40mLufthansa
Wed 11/265:55 amOTP - STL
1 stop16h 00mLufthansa
Deal found 8/13$614
This United Airlines deal was found by Cheapflights users on 8/13. 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 11/193:50 pmSTL - OTP
1 stop14h 10mUnited Airlines
Thu 11/275:50 amOTP - STL
2 stops41h 39mUnited Airlines
Deal found 8/13$616
This Air Canada deal was found by Cheapflights users on 8/13. 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.
Sat 11/154:05 pmSTL - OTP
2 stops38h 00mAir Canada
Thu 11/275:50 amOTP - STL
2 stops41h 39mAir Canada
Deal found 8/13$622
This Lufthansa deal was found by Cheapflights users on 8/13. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/163:50 pmSTL - OTP
1 stop18h 35mLufthansa
Tue 11/252:50 pmOTP - STL
1 stop31h 05mLufthansa
Deal found 8/13$628
This KAYAK deal was found by Cheapflights users on 8/13. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/156:43 pmSTL - OTP
2 stops35h 22mLufthansa
Wed 11/265:55 amOTP - STL
1 stop16h 00mLufthansa
Deal found 8/13$629
This KAYAK deal was found by Cheapflights users on 8/13. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/193:50 pmSTL - OTP
1 stop14h 20mLufthansa
Tue 11/257:25 pmOTP - STL
1 stop26h 30mLufthansa
Deal found 8/13$633
This KAYAK deal was found by Cheapflights users on 8/13. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1811:49 amSTL - OTP
2 stops29h 16mLufthansa
Tue 11/257:25 pmOTP - STL
1 stop26h 30mLufthansa
Deal found 8/13$634

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 August 14, 2025.
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

Wed 11/19

3:50 pm-2:00 pm

1 stop14h 10m

Bucharest Otopeni Intl

Wed 11/26

6:05 am-1:55 pm

1 stop15h 50m

$588

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Sun 11/16

4:05 pm-3:50 pm

2 stops15h 45m

Bucharest Otopeni Intl

Mon 11/24

7:10 pm-3:29 pm

2 stops52h 19m

$605

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Mon 11/17

2:17 pm-3:30 pm

2 stops17h 13m

Bucharest Otopeni Intl

Tue 11/25

8:00 am-10:29 pm

2 stops22h 29m

$611

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Sun 11/16

3:23 pm-2:55 pm

2 stops15h 32m

Bucharest Otopeni Intl

Tue 11/25

8:00 am-10:29 pm

2 stops22h 29m

$611

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Sun 2/1

12:53 pm-2:55 pm

2 stops18h 02m

Bucharest Otopeni Intl

Tue 2/17

8:00 am-9:44 pm

2 stops21h 44m

$612

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Sun 11/16

3:50 pm-6:30 pm

1 stop18h 40m

Bucharest Otopeni Intl

Wed 11/26

5:55 am-1:55 pm

1 stop16h 00m

$614

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Tue 11/18

11:49 am-1:05 am

2 stops29h 16m

Bucharest Otopeni Intl

Wed 11/26

5:55 am-1:55 pm

1 stop16h 00m

$615

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Mon 11/17

6:43 pm-6:30 pm

2 stops15h 47m

Bucharest Otopeni Intl

Wed 11/26

5:55 am-1:55 pm

1 stop16h 00m

$615

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Sun 11/16

3:50 pm-2:05 pm

1 stop14h 15m

Bucharest Otopeni Intl

Thu 11/27

5:50 am-3:29 pm

2 stops41h 39m

$616

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Mon 11/17

4:05 pm-3:50 pm

2 stops15h 45m

Bucharest Otopeni Intl

Thu 11/27

5:50 am-3:29 pm

2 stops41h 39m

$616

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/14

Showing 1-10 of 15 results
1
2

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.

Cheapflights Insights

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

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

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

Unlike in the afternoon, when flights are generally more expensive, you can save up to 16% on flights from St. Louis to Bucharest Otopeni Intl Airport by exploring options for tickets at noon.

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 August 14, 2025.
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
8,916 reviews

Boarding

7.7

Entertainment

7.1

Overall

7.4

Comfort

7.3

Food

6.6

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
8,916 reviews
United Airlines
7.4
Good
8,916 reviews

Boarding

7.7

Entertainment

7.1

Overall

7.4

Comfort

7.3

Food

6.6

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Lufthansa
6.8
Okay
7,317 reviews
United Airlines
7.4
Good
8,916 reviews

Boarding

7.7

Entertainment

7.1

Overall

7.4

Comfort

7.3

Food

6.6

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

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.

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

    According to our current data, United Airlines ($759), and Lufthansa ($780) offers the cheapest pricing from St. Louis to Bucharest Otopeni Intl Airport. You may be able to fly from St. Louis to Bucharest Otopeni Intl Airport for 31% less than the average price by searching for these airlines.

  • 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.

  • What is the cheapest month to book a flight from St. Louis to Bucharest Otopeni Intl Airport?

    Currently, November is the cheapest month in which you can book a flight from St. Louis to Bucharest Otopeni Intl Airport (average of $604). Flying from St. Louis to Bucharest Otopeni Intl Airport in June is currently the most expensive (average of $1,134). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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
Columbia to Otopeni Intl flights

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 August 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$759Average$941FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$780Average$1,055FlexibilityNo cancel feeOn-time76%

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