Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from St. Louis to Bucharest from $630

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Bucharest departing on 4/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from St. Louis to Bucharest

Cheap round-trip flights

Enter your travel dates to find the best prices.
Lufthansa Logo
5:18 pm - 6:35 pmSTL-OTP
17h 17m2 stops
Lufthansa Logo
6:05 am - 1:30 pmOTP-STL
15h 25m1 stop
$630Lufthansa
Find Deal
Fri, Apr 10 - Fri, Apr 17
Lufthansa Logo
3:30 pm - 1:05 pmSTL-OTP
13h 35m1 stop
Lufthansa Logo
6:05 am - 1:30 pmOTP-STL
15h 25m1 stop
$638Lufthansa
Find Deal
Fri, Apr 10 - Fri, Apr 17
United Airlines Logo
5:18 pm - 6:35 pmSTL-OTP
17h 17m2 stops
United Airlines Logo
6:00 am - 1:30 pmOTP-STL
15h 30m1 stop
$639United Airlines
Find Deal
Fri, Apr 10 - Fri, Apr 17
Multiple Airlines Logo
3:30 pm - 1:05 pmSTL-OTP
13h 35m1 stop
Multiple Airlines Logo
6:05 am - 1:30 pmOTP-STL
15h 25m1 stop
$647Multiple Airlines
Find Deal
Fri, Apr 10 - Fri, Apr 17
Multiple Airlines Logo
5:18 pm - 6:35 pmSTL-OTP
17h 17m2 stops
Multiple Airlines Logo
6:00 am - 2:18 pmOTP-STL
16h 18m2 stops
$648Multiple Airlines
Find Deal
Fri, Apr 10 - Thu, Apr 16
United Airlines Logo
5:18 pm - 6:35 pmSTL-OTP
17h 17m2 stops
United Airlines Logo
6:05 am - 10:06 pmOTP-STL
24h 01m2 stops
$649United Airlines
Find Deal
Fri, Apr 10 - Fri, Apr 17
Air Canada Logo
4:05 pm - 3:20 pmSTL-OTP
15h 15m2 stops
Air Canada Logo
6:05 am - 7:25 pmOTP-STL
21h 20m3 stops
$1,281Air Canada
Find Deal
Fri, Apr 10 - Fri, Apr 17
Air Canada Logo
1:00 pm - 3:50 pmSTL-OTP
18h 50m3 stops
Air Canada Logo
6:55 am - 9:43 pmOTP-STL
22h 48m3 stops
$1,685Air Canada
Find Deal
Sun, Dec 14 - Sun, Dec 21
Emirates Logo
5:18 pm - 3:00 pmSTL-OTP
37h 42m2 stops
Emirates Logo
2:20 am - 9:04 pmOTP-STL
26h 44m2 stops
$2,682Emirates
Find Deal
Fri, Apr 10 - Thu, Apr 16
Emirates Logo
5:18 pm - 3:00 pmSTL-OTP
37h 42m2 stops
Emirates Logo
2:20 am - 9:04 pmOTP-STL
26h 44m2 stops
$4,664Emirates
Find Deal
Fri, Apr 10 - Wed, Apr 15

Lufthansa flights from St. Louis to Bucharest

Our best Lufthansa deals on St. Louis to Bucharest flight tickets
Lufthansa
Apr 10
STL5:18 pmLambert-St Louis
17h 17m
2 stops
OTP6:35 pmBucharest Otopeni Intl
Apr 17
OTP6:05 amBucharest Otopeni Intl
15h 25m
1 stop
STL1:30 pmLambert-St Louis
$630
Find similar
Lufthansa
Apr 10
STL3:30 pmLambert-St Louis
13h 35m
1 stop
OTP1:05 pmBucharest Otopeni Intl
Apr 17
OTP6:05 amBucharest Otopeni Intl
15h 25m
1 stop
STL1:30 pmLambert-St Louis
$638
Find similar
Lufthansa
Apr 10
STL3:30 pmLambert-St Louis
13h 35m
1 stop
OTP1:05 pmBucharest Otopeni Intl
Apr 16
OTP5:15 pmBucharest Otopeni Intl
28h 15m
1 stop
STL1:30 pmLambert-St Louis
$665
Find similar

United Airlines flights from St. Louis to Bucharest

Our best United Airlines deals on St. Louis to Bucharest flight tickets
United Airlines
Apr 10
STL5:18 pmLambert-St Louis
17h 17m
2 stops
OTP6:35 pmBucharest Otopeni Intl
Apr 17
OTP6:00 amBucharest Otopeni Intl
15h 30m
1 stop
STL1:30 pmLambert-St Louis
$639
Find similar
United Airlines
Apr 10
STL5:18 pmLambert-St Louis
17h 17m
2 stops
OTP6:35 pmBucharest Otopeni Intl
Apr 17
OTP6:05 amBucharest Otopeni Intl
24h 01m
2 stops
STL10:06 pmLambert-St Louis
$649
Find similar
United Airlines
Mar 27
STL4:50 pmLambert-St Louis
18h 45m
2 stops
OTP6:35 pmBucharest Otopeni Intl
Mar 31
OTP6:05 amBucharest Otopeni Intl
17h 16m
2 stops
STL3:21 pmLambert-St Louis
$680
Find similar

momondo 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, momondo users made 832,500 searches. Data last updated October 30, 2025.
Use the filters below to find and compare flights from St. Louis to Bucharest that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Fri 4/10

5:18 pm-6:35 pm

2 stops17h 17m

Bucharest Otopeni Intl

Fri 4/17

6:05 am-1:30 pm

1 stop15h 25m

$630

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Fri 4/10

3:30 pm-1:05 pm

1 stop13h 35m

Bucharest Otopeni Intl

Fri 4/17

6:05 am-1:30 pm

1 stop15h 25m

$638

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Fri 4/10

5:18 pm-6:35 pm

2 stops17h 17m

Bucharest Otopeni Intl

Fri 4/17

6:00 am-1:30 pm

1 stop15h 30m

$639

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Fri 4/10

3:30 pm-1:05 pm

1 stop13h 35m

Bucharest Otopeni Intl

Fri 4/17

6:05 am-1:30 pm

1 stop15h 25m

$647

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Fri 4/10

5:18 pm-6:35 pm

2 stops17h 17m

Bucharest Otopeni Intl

Thu 4/16

6:00 am-2:18 pm

2 stops16h 18m

$648

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Fri 4/10

5:18 pm-6:35 pm

2 stops17h 17m

Bucharest Otopeni Intl

Fri 4/17

6:05 am-10:06 pm

2 stops24h 01m

$649

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Fri 4/10

4:05 pm-3:20 pm

2 stops15h 15m

Bucharest Otopeni Intl

Fri 4/17

6:05 am-7:25 pm

3 stops21h 20m

$1,281

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Sun 12/14

1:00 pm-3:50 pm

3 stops18h 50m

Bucharest Otopeni Intl

Sun 12/21

6:55 am-9:43 pm

3 stops22h 48m

$1,685

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Fri 4/10

5:18 pm-3:00 pm

2 stops37h 42m

Bucharest Otopeni Intl

Thu 4/16

2:20 am-9:04 pm

2 stops26h 44m

$2,682

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Fri 4/10

5:18 pm-3:00 pm

2 stops37h 42m

Bucharest Otopeni Intl

Wed 4/15

2:20 am-9:04 pm

2 stops26h 44m

$4,664

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to Bucharest from

How to get the cheapest flight ticket from St. Louis to Bucharest

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Bucharest?

Our data shows that Saturday is the least expensive day to fly to Bucharest. Tickets to fly out on this day can be as low as $813. The most expensive day to fly to Bucharest is Wednesday, with ticket prices averaging around $1,473.

What is the cheapest time of day to depart on your flight to Bucharest?

According to our data, the cheapest time of day to fly to Bucharest is in the morning. momondo users have found flights departing from St. Louis to Bucharest in the morning for as low as $1,059. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In contrast, the most expensive time of day to depart to Bucharest is in the afternoon when prices are around $1,313.

When to book flights from St. Louis to Bucharest

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Bucharest according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap St. Louis to Bucharest (STL to BUH) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Bucharest

Direct flights

None
There are no direct flights from St. Louis to Bucharest. There are no popular flight routes from St. Louis to Bucharest.
Search flight deals

  • How far is Lambert-St Louis to Bucharest by plane?

    Lambert-St Louis and Bucharest are 5458.3 mi apart from one another. Flights usually cover this in 13h 35m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Bucharest?

    Prices for flights from Lambert-St Louis Airport to Bucharest are refreshed on a daily basis.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Bucharest?

  • How old do you have to be to fly from Lambert-St Louis Airport to Bucharest?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Lambert-St Louis Airport to Bucharest.

  • What documentation or ID do you need to fly to Bucharest?

    The travel and health documents required for your trip to Bucharest can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Bucharest. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular airline from St. Louis to Bucharest?

Best airlines flying from St. Louis to Bucharest

Compare and see reviews for airlines that fly from St. Louis to Bucharest with momondo
Airline
Rating
Free Cancellation
Price
LufthansaPriceFrom $780Free CancellationRating
6.8
7,541 reviews
Search Lufthansa flights
United AirlinesPriceFrom $784Free CancellationRating
7.4
8,998 reviews
Search United Airlines flights

Traveling to a place near Bucharest?

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

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Bucharest?

It is quick and easy to find St. Louis to Bucharest flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Bucharest that suits you.

Can I find flights from St. Louis to Bucharest with flexible booking policies on momondo?

All flight searches from St. Louis to Bucharest on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from St. Louis to Bucharest?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from St. Louis to Bucharest.

I’m not ready to book a flight from St. Louis to Bucharest right now. Can momondo alert me if prices change?

Yes. momondo can track prices for St. Louis to Bucharest flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

An easier way to manage your Bucharest trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sat 11/29
Sat 12/6
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Romania

Fly into one of these airports located in Bucharest

Airports listed have a maximum distance of 9.6 mi from Bucharest
Bucharest Otopeni Intl Airport