Cheap flights from St. Louis to Tokyo from $409

The cheapest month to fly to Tokyo from St. Louis is in February. Flight prices, which tend to average around $856, are often lower during this time because this is during the off-season. If you’re not able to fly to Tokyo in February, then January is your next best option. Flight prices from St. Louis to Tokyo during January average around $898.

You are more likely to see cheaper flights to Tokyo from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Tokyo for around $1,258 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Tokyo from St. Louis for as low as $672 on momondo.

You could potentially save up to 24% on your flight if you consider stops on a St. Louis to Tokyo flight.

As of September 2026, prices for St. Louis to Tokyo flights are approximately 153% more expensive when compared to flights at the same time last year.

Cathay Pacific is the most popular carrier operating from Lambert-St Louis to Tokyo

United Airlines, Delta and Japan Airlines are the top three most popular airlines that fly to Tokyo from St. Louis according to our data. United Airlines is the first choice among our users, with 30% of people opting to fly with this airline when traveling to Tokyo. Keep in mind that there are 6 different airlines that fly to Tokyo on a routine basis, so you have a few additional options to choose from.

Chicago (ORD) was the most common stop: 58% of momondo users choosing 1-stop flights on this route connected there.

Flights via San Francisco (SFO) offer the lowest average round-trip price of $759.

Flights connecting via Detroit (DTW) have the shortest average one-way travel time: 15h 25m.

Denver (DEN) has the shortest average layover time for this route: 1h 08m.