Cheap flights from St. Louis to Bucharest from $718
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 3/7. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Not ready to book? to track prices.Lufthansa flights from St. Louis to Bucharest
Our best Lufthansa deals on St. Louis to Bucharest flight tickets
Delta flights from St. Louis to Bucharest
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Fly from
Fly to
Route
Depart
Return
St. LouisBucharest
STL Lambert-St Louis - OTP Bucharest Otopeni Intl
STLOTP
Lambert-St Louis
Sun 3/7
4:05 pm-3:50 pm
2 stops15h 45m
Bucharest Otopeni Intl
Wed 3/17
6:00 am-2:45 pm
1 stop15h 45m
St. LouisBucharest
STL Lambert-St Louis - OTP Bucharest Otopeni Intl
STLOTP
Lambert-St Louis
Sun 3/7
3:40 pm-1:55 pm
1 stop14h 15m
Bucharest Otopeni Intl
Wed 3/17
6:00 am-2:45 pm
1 stop15h 45m
St. LouisBucharest
STL Lambert-St Louis - OTP Bucharest Otopeni Intl
STLOTP
Lambert-St Louis
Sun 3/7
4:05 pm-3:50 pm
2 stops15h 45m
Bucharest Otopeni Intl
Wed 3/17
4:40 pm-3:26 pm
2 stops53h 46m
St. LouisBucharest
STL Lambert-St Louis - OTP Bucharest Otopeni Intl
STLOTP
Lambert-St Louis
Wed 1/27
1:17 pm-6:30 pm
2 stops21h 13m
Bucharest Otopeni Intl
Thu 2/11
6:00 am-9:12 pm
2 stops23h 12m
St. LouisBucharest
STL Lambert-St Louis - OTP Bucharest Otopeni Intl
STLOTP
Lambert-St Louis
Mon 3/8
7:04 pm-6:30 pm
2 stops15h 26m
Bucharest Otopeni Intl
Wed 3/17
6:00 am-2:45 pm
1 stop15h 45m
St. LouisBucharest
STL Lambert-St Louis - OTP Bucharest Otopeni Intl
STLOTP
Lambert-St Louis
Sun 3/7
3:40 pm-1:55 pm
1 stop14h 15m
Bucharest Otopeni Intl
Fri 3/19
5:55 am-2:45 pm
1 stop15h 50m
St. LouisBucharest
STL Lambert-St Louis - OTP Bucharest Otopeni Intl
STLOTP
Lambert-St Louis
Sun 3/7
2:18 pm-3:50 pm
2 stops17h 32m
Bucharest Otopeni Intl
Thu 3/18
8:35 am-8:37 pm
2 stops19h 02m
St. LouisBucharest
STL Lambert-St Louis - OTP Bucharest Otopeni Intl
STLOTP
Lambert-St Louis
Sun 3/7
2:18 pm-3:50 pm
2 stops17h 32m
Bucharest Otopeni Intl
Tue 3/16
6:00 am-5:56 pm
2 stops18h 56m
St. LouisBucharest
STL Lambert-St Louis - OTP Bucharest Otopeni Intl
STLOTP
Lambert-St Louis
Wed 3/10
8:25 am-11:55 pm
2 stops31h 30m
Bucharest Otopeni Intl
Fri 3/19
5:55 am-2:45 pm
1 stop15h 50m
St. LouisBucharest
STL Lambert-St Louis - OTP Bucharest Otopeni Intl
STLOTP
Lambert-St Louis
Wed 3/10
7:00 am-11:55 pm
3 stops32h 55m
Bucharest Otopeni Intl
Fri 3/19
5:55 am-2:45 pm
1 stop15h 50m
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 month to fly to Bucharest?
In general, February is the cheapest month to fly from St. Louis to Bucharest. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $0. If you aren’t able to travel to Bucharest during the month of February, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $0.
Can stopping save me money on St. Louis to Bucharest flights?
You could potentially save up to 50% on your flight if you consider stops on a St. Louis to Bucharest flight.
Which airport is the most popular layover for flights between St. Louis and Bucharest?
Frankfurt am Main (FRA) was the most common stop: 87% of momondo users choosing 1-stop flights on this route connected there.
Which layover airport offers the lowest fares from St. Louis to Bucharest?
Flights via Frankfurt am Main (FRA) offer the lowest average round-trip price of $986.
Which layover airport has the shortest travel time from St. Louis to Bucharest?
Flights connecting via Frankfurt am Main (FRA) have the shortest average one-way travel time: 13h 27m.
Which layover airport has the shortest connection time from St. Louis to Bucharest?
Frankfurt am Main (FRA) has the shortest average layover time for this route: 2h 40m.
When to book flights from St. Louis to Bucharest
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
Frequently asked questions about flying from St. Louis to Bucharest
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 14h 15m, 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?
As of October 2026, there are 2 operators available to choose from 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?
momondo data reveals that the most frequently booked airline on the route from St. Louis to Bucharest is Lufthansa, representing 69% of all bookings. The subsequent popular airline is Delta at 31%.
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 | ||
|---|---|---|---|---|---|
| PriceFrom $574 | Free Cancellation | Rating 7.4 10,297 reviews | |||
| PriceFrom $780 | Free Cancellation | Rating 6.8 8,263 reviews |
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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.
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