Cheap flights from St. Louis to Japan from $431
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Japan departing on 12/2. 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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Fly from
Fly to
Route
Depart
Return
St. LouisTokyo
STL Lambert-St Louis - NRT Tokyo Narita
STLNRT
Lambert-St Louis
Mon 2/1
4:05 pm-4:30 pm
2 stops33h 25m
Tokyo Narita
Tue 2/16
6:45 pm-3:04 pm
2 stops35h 19m
St. LouisTokyo
STL Lambert-St Louis - NRT Tokyo Narita
STLNRT
Lambert-St Louis
Fri 2/5
4:05 pm-4:30 pm
2 stops57h 25m
Tokyo Narita
Tue 2/16
6:45 pm-3:04 pm
2 stops35h 19m
St. LouisTokyo
STL Lambert-St Louis - HND Tokyo Haneda
STLHND
Lambert-St Louis
Mon 2/1
9:41 am-6:25 pm
1 stop17h 44m
Tokyo Haneda
Fri 2/12
6:00 pm-11:56 pm
1 stop20h 56m
St. LouisTokyo
STL Lambert-St Louis - HND Tokyo Haneda
STLHND
Lambert-St Louis
Sun 2/7
9:41 am-6:25 pm
1 stop17h 44m
Tokyo Haneda
Fri 2/19
6:00 pm-11:56 pm
1 stop20h 56m
St. LouisTokyo
STL Lambert-St Louis - HND Tokyo Haneda
STLHND
Lambert-St Louis
Mon 2/1
6:00 am-5:45 pm
2 stops20h 45m
Tokyo Haneda
Fri 2/12
5:35 pm-11:39 pm
2 stops21h 04m
St. LouisTokyo
STL Lambert-St Louis - HND Tokyo Haneda
STLHND
Lambert-St Louis
Mon 2/1
6:30 am-3:05 pm
2 stops17h 35m
Tokyo Haneda
Fri 2/12
4:50 pm-4:54 pm
1 stop15h 04m
St. LouisTokyo
STL Lambert-St Louis - HND Tokyo Haneda
STLHND
Lambert-St Louis
Tue 2/2
10:48 am-9:10 pm
1 stop19h 22m
Tokyo Haneda
Tue 2/16
6:20 pm-6:06 pm
1 stop14h 46m
St. LouisTokyo
STL Lambert-St Louis - NRT Tokyo Narita
STLNRT
Lambert-St Louis
Tue 2/2
6:15 am-3:30 pm
1 stop18h 15m
Tokyo Narita
Wed 2/17
5:05 pm-6:06 pm
1 stop16h 01m
St. LouisTokyo
STL Lambert-St Louis - HND Tokyo Haneda
STLHND
Lambert-St Louis
Mon 2/8
5:02 am-6:55 pm
2 stops22h 53m
Tokyo Haneda
Fri 2/12
6:20 pm-7:24 pm
1 stop16h 04m
St. LouisTokyo
STL Lambert-St Louis - HND Tokyo Haneda
STLHND
Lambert-St Louis
Mon 2/8
6:45 pm-6:55 pm
2 stops33h 10m
Tokyo Haneda
Fri 2/12
6:20 pm-6:06 pm
1 stop14h 46m
See travel insights to Japan from
How to get the cheapest flight ticket from St. Louis to Japan
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 Japan?
The month of February is, on average, the cheapest month to fly to Japan from St. Louis, with most prices found around $835. If you aren’t able to travel to Japan 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 $945.
How far in advance should I book a flight from St. Louis to Japan?
You are more likely to see cheaper flights to Japan from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Japan for around $1,282 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Japan from St. Louis for as low as $916 on momondo.
What is the cheapest airline that flies from Lambert-St Louis to Japan?
Cathay Pacific, Japan Airlines, and Delta are the most popular carriers operating from Lambert-St Louis to Japan
What airlines fly to Japan?
United Airlines, Delta and ANA are the top three most popular airlines that fly to Japan from St. Louis according to our data. United Airlines is the first choice among our users, with 29% of people opting to fly with this airline when traveling to Japan. Keep in mind that there are 6 different airlines that fly to Japan on a routine basis, so you have a few additional options to choose from.
Cheap St. Louis to Japan flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from St. Louis to Japan
Frequently asked questions about flying from St. Louis to Japan
When did momondo last update prices for flights from Lambert-St Louis Airport to Japan?
Prices for flights from Lambert-St Louis Airport to Japan were last updated today.
How many operators does momondo search for flights from Lambert-St Louis Airport to Japan?
There are 6 operators available for flights from Lambert-St Louis Airport to Japan as of October 2026.
How old do you have to be to fly from Lambert-St Louis Airport to Japan?
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 Japan.
What documentation or ID do you need to fly to Japan?
The necessary travel and health documents for your Japan trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
Best airlines flying from St. Louis to Japan
Compare and see reviews for airlines that fly from St. Louis to Japan with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $667 | Free Cancellation | Rating 7.1 11,745 reviews | |||
| PriceFrom $697 | Free Cancellation | Rating 7.4 10,319 reviews | |||
| PriceFrom $697 | Free Cancellation | Rating 7.0 12,146 reviews | |||
| PriceFrom $739 | Free Cancellation | Rating 7.8 8,645 reviews | |||
| PriceFrom $785 | Free Cancellation | Rating 8.3 1,321 reviews | |||
| PriceFrom $846 | Free Cancellation | Rating 8.3 1,935 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from St. Louis to Japan?
Finding the right flight to Japan from St. Louis is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Japan quick and easy, saving you time and money.
Can I find flights from St. Louis to Japan with flexible booking policies on momondo?
momondo does allow users to show only those flights to Japan from St. Louis which offer a flexible booking policy as well as other useful filters and features.
How can momondo help me find flights from St. Louis to Japan?
Once you have performed a search for St. Louis to Japan flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.
I’m not ready to book a flight from St. Louis to Japan right now. Can momondo alert me if prices change?
Yes momondo offers price alerts on flights to Japan from St. Louis. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.