Cheap flights from Japan to St. Louis from $521
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Japan to St. Louis departing on 7/18. 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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How to get the cheapest flight ticket from Japan to St. Louis
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 St. Louis?
The cheapest day to depart on your flight to St. Louis is on a Monday when prices can be found for as low as $804. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Friday because tickets tend to average around $1,647. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.
What is the cheapest time of day to depart on your flight to St. Louis?
Flying to St. Louis from Japan in the evening is the least expensive time of day to depart. momondo users have found prices as low as $984 when looking at flights departing in the evening. In the morning is when there is more demand to fly to St. Louis, so prices are often more expensive at around $1,258 per ticket.
What is the cheapest airline that flies from Japan to Lambert-St Louis?
Delta, United Airlines, and American Airlines are the most popular carriers operating from Japan to Lambert-St Louis
What airlines fly to St. Louis?
American Airlines, United Airlines and Japan Airlines are the top three most popular airlines that fly to St. Louis from Japan according to our data. American Airlines is the first choice among our users, with 51% of people opting to fly with this airline when traveling to St. Louis. Keep in mind that there are 3 different airlines that fly to St. Louis on a routine basis, so you have a few additional options to choose from.
Cheap Japan to St. Louis flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Japan to St. Louis
When did momondo last update prices for flights from Japan to Lambert-St Louis Airport?
Prices for flights from Japan to Lambert-St Louis Airport refresh daily.
How many operators does momondo search for flights from Japan to Lambert-St Louis Airport?
As of July 2025, there are 3 operators available to choose from for flights from Japan to Lambert-St Louis Airport.
How old do you have to be to fly from Japan to Lambert-St Louis Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Japan to Lambert-St Louis Airport.
What documentation or ID do you need to fly to Lambert-St Louis Airport?
The required travel and health documents for your Lambert-St Louis Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Lambert-St Louis Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
Best airlines flying from Japan to St. Louis
Compare and see reviews for airlines that fly from Japan to St. Louis with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $640 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $787 | Free Cancellation | Rating 7.4 8,861 reviews | |||
| PriceFrom $1,515 | Free Cancellation | Rating 8.3 1,503 reviews |
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Why should I use momondo to find a flight deal from Japan to St. Louis?
We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Japan to St. Louis for you.
Can I find flights from Japan to St. Louis with flexible booking policies on momondo?
Flights from Japan to St. Louis with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.
How can momondo help me find flights from Japan to St. Louis?
momondo helps you find the best flight between Japan and St. Louis by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.
I’m not ready to book a flight from Japan to St. Louis right now. Can momondo alert me if prices change?
If you are not ready to book a flight from Japan to St. Louis now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to St. Louis and let you know when they change.