What are the cheapest airlines flying from St. Louis to Osaka round-trip?

According to our current data, American Airlines ($753), United Airlines ($848), and Japan Airlines ($965) offers the cheapest pricing from St. Louis to Osaka. Users have found that American Airlines is 41% cheaper than the other options available to this destination.

What is the cheapest month to book a flight from St. Louis to Osaka?

Currently, February is the cheapest month in which you can book a flight from St. Louis to Osaka (average of $912). Flying from St. Louis to Osaka in December is currently the most expensive (average of $1,366). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest day to fly from St. Louis to Osaka?

Travelers seeking maximum savings on their St. Louis to Osaka flight should consider departing on Monday mornings when fares are most often at their lowest. Monday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

What is the cheapest day to fly round-trip from St. Louis to Osaka?

Tuesday flights are found to be more expensive to fly from St. Louis to Osaka. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Osaka.

What is the cheapest month to fly from St. Louis to Osaka?

The best pricing can be found in the month of September. Prices to Osaka from St. Louis average $1,294. You can even find prices in September for less than $1,294, as users have found deals to Osaka from as low as $727. The month of May appears to be one of the more expensive times to travel to Osaka from St. Louis. Flying in the targeted month can save you up to 49%.

What is the cheapest time of day to fly from STL to OSA?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from St. Louis to Osaka as you normally would.

Most accurate provider : When it comes to deals on St. Louis-Osaka flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Osaka flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Osaka flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on St. Louis-Osaka flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Osaka flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

What airport do you fly from for flights from St. Louis to Osaka?

Located just 12.7 mi from the city center, Lambert-St Louis is the airport most travelers will use when flying to Osaka from St. Louis. Booking flights from Lambert-St Louis (STL) to Osaka should be relatively easy as there are 0 daily outbound flights to Osaka from 2 different airlines.

Can I find deals for flights from St. Louis to Osaka that include hotel bookings?

Yes. In addition to deals on St. Louis to Osaka flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from St. Louis to Osaka?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Osaka.

Can I find deals for business class flights from St. Louis to Osaka?

Yes. Cheapflights offers flight deals from St. Louis to Osaka by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$662+ Save on Flights from St. Louis to Osaka

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Cheap flight deals from St. Louis to Osaka

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$753 (American Airlines)
One-way from	$662 (Kiwi.com)
Popular in	May
Cheapest in	September
Average price	$888

Provider with most accurate pricing for Lambert-St Louis-Osaka (OSA) flight deals.

Search Deals

Provider most trusted by Cheapflights users for Lambert-St Louis-Osaka (OSA) flights.

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From Lambert-St Louis to Osaka (OSA)

Search Deals

One-way flight from Lambert-St Louis to Osaka (OSA)

Search Deals

Highest demand for flights based on searches. 25% potential increase in price ($432 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 5% potential price decrease ($72 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in February 2025

Search Deals

Find flight deals from St. Louis to Osaka

Cheapest flights from St. Louis to Osaka
Explore the most affordable flight options available from St. Louis to Osaka. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 20, 2025.

Tue 9/27:15 amSTL - KIX

1 stop17h 35mUnited Airlines

Fri 10/34:50 pmKIX - STL

1 stop21h 37mUnited Airlines

Deal found 2/19

$738

Tue 9/27:00 amSTL - KIX

1 stop21h 45mJapan Airlines

Fri 10/38:55 pmKIX - STL

2 stops36h 59mJapan Airlines

Deal found 2/19

$740

Tue 7/297:33 amSTL - ITM

2 stops21h 32mAmerican Airlines

Fri 8/82:35 pmITM - STL

2 stops19h 12mAmerican Airlines

Deal found 2/20

$753

Tue 9/26:45 amSTL - ITM

2 stops22h 25mANA

Fri 10/38:00 amITM - STL

2 stops20h 18mANA

Deal found 2/19

$783

Fri 11/216:15 amSTL - ITM

2 stops20h 55mUnited Airlines

Sat 12/61:00 pmITM - STL

2 stops23h 10mUnited Airlines

Deal found 2/19

$1,092

Wed 3/125:55 amSTL - ITM

2 stops21h 35mJapan Airlines

Mon 3/174:25 pmITM - STL

2 stops44h 44mJapan Airlines

Deal found 2/20

$1,127

Tue 7/298:10 amSTL - KIX

2 stops23h 40mANA

Fri 8/86:45 amKIX - STL

2 stops24h 14mANA

Deal found 2/20

$1,306

Wed 3/1211:55 amSTL - KIX

2 stops28h 25mCathay Pacific

Tue 3/189:25 amKIX - STL

2 stops27h 44mCathay Pacific

Deal found 2/20

$1,430

Sat 4/57:45 amSTL - KIX

2 stops24h 30mMultiple Airlines

Sat 4/127:35 amKIX - STL

3 stops45h 14mMultiple Airlines

Deal found 2/20

$1,522

Wed 6/111:30 pmSTL - KIX

2 stops36h 55mAir Canada

Fri 6/276:05 pmKIX - STL

1 stop32h 31mAir Canada

Deal found 2/20

$1,973

Sun 4/69:39 amSTL - ITM

2 stops32h 26mMultiple Airlines

Sun 4/132:30 pmITM - STL

3 stops35h 50mMultiple Airlines

Deal found 2/20

$2,119

Sun 4/66:15 amSTL - KIX

1 stop22h 30mAmerican Airlines

Sun 4/135:55 pmKIX - STL

1 stop19h 21mAmerican Airlines

Deal found 2/20

$2,513

Best flights from St. Louis to Osaka
Discover carefully curated flight deals from St. Louis to Osaka that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 20, 2025.

Tue 7/297:33 amSTL - ITM

2 stops21h 32mAmerican Airlines

Fri 8/82:35 pmITM - STL

2 stops19h 12mAmerican Airlines

Deal found 2/20

$753

Tue 3/117:00 amSTL - KIX

1 stop19h 35mUnited Airlines

Tue 3/186:30 pmKIX - STL

2 stops29h 21mUnited Airlines

Deal found 2/20

$848

Tue 3/115:55 amSTL - KIX

2 stops26h 20mJapan Airlines

Sun 3/165:50 pmKIX - STL

1 stop19h 19mJapan Airlines

Deal found 2/20

$965

Sun 4/69:39 amSTL - ITM

2 stops31h 46mANA

Sun 4/136:00 pmITM - STL

2 stops32h 20mANA

Deal found 2/20

$1,158

Wed 3/1211:55 amSTL - KIX

2 stops28h 25mCathay Pacific

Tue 3/189:25 amKIX - STL

2 stops27h 44mCathay Pacific

Deal found 2/20

$1,430

Sat 4/57:45 amSTL - KIX

2 stops24h 30mMultiple Airlines

Sat 4/127:35 amKIX - STL

3 stops45h 14mMultiple Airlines

Deal found 2/20

$1,522

Wed 6/111:30 pmSTL - KIX

2 stops36h 55mAir Canada

Fri 6/276:05 pmKIX - STL

1 stop32h 31mAir Canada

Deal found 2/20

$1,973

Mon 5/197:00 amSTL - ITM

2 stops20h 05mUnited Airlines

Tue 6/312:00 pmITM - STL

3 stops48h 15mUnited Airlines

Deal found 2/19

$1,124

Wed 3/125:55 amSTL - ITM

2 stops21h 35mJapan Airlines

Mon 3/174:25 pmITM - STL

2 stops44h 44mJapan Airlines

Deal found 2/20

$1,127

Tue 7/298:10 amSTL - KIX

2 stops23h 40mANA

Fri 8/86:45 amKIX - STL

2 stops24h 14mANA

Deal found 2/20

$1,306

Sun 4/69:39 amSTL - ITM

2 stops32h 26mMultiple Airlines

Sun 4/132:30 pmITM - STL

3 stops35h 50mMultiple Airlines

Deal found 2/20

$2,119

Sun 4/66:15 amSTL - KIX

1 stop22h 30mAmerican Airlines

Sun 4/135:55 pmKIX - STL

1 stop19h 21mAmerican Airlines

Deal found 2/20

$2,513

Last-minute flights from St. Louis to Osaka
Discover last-minute flight deals from St. Louis to Osaka. Data last updated February 20, 2025 and is based on user searches.

Tue 3/117:00 amSTL - KIX

1 stop19h 35mUnited Airlines

Tue 3/186:30 pmKIX - STL

2 stops29h 21mUnited Airlines

Deal found 2/20

$848

Tue 3/115:55 amSTL - KIX

2 stops26h 20mJapan Airlines

Sun 3/165:50 pmKIX - STL

1 stop19h 19mJapan Airlines

Deal found 2/20

$965

Tue 3/113:50 pmSTL - ITM

2 stops37h 20mAir Canada

Mon 3/174:00 pmITM - STL

2 stops37h 06mAir Canada

Deal found 2/20

$2,871

Wed 3/125:55 amSTL - ITM

2 stops21h 35mJapan Airlines

Mon 3/174:25 pmITM - STL

2 stops44h 44mJapan Airlines

Deal found 2/20

$1,127

Wed 3/1211:55 amSTL - KIX

2 stops28h 25mCathay Pacific

Tue 3/189:25 amKIX - STL

2 stops27h 44mCathay Pacific

Deal found 2/20

$1,430

Wed 3/124:45 pmSTL - KIX

3 stops30h 35mMultiple Airlines

Mon 3/177:10 amKIX - STL

2 stops19h 02mMultiple Airlines

Deal found 2/20

$3,383

Fri 3/1411:05 amSTL - ITM

2 stops32h 05mANA

Fri 3/217:30 amITM - STL

2 stops21h 03mANA

Deal found 2/20

$2,802

One-way flights from St. Louis to Osaka
Search for one-way flight options from St. Louis to Osaka. Find affordable one-way fares based on user searches. Data last updated February 20, 2025.

Thu 5/159:55 pmSTL - KIX

2 stops30h 50mMultiple Airlines

Deal found 2/20

$662

Thu 5/157:00 amSTL - KIX

1 stop17h 50mUnited Airlines

Deal found 2/20

$955

Find flights from St. Louis to Osaka within your budget

Fly from

Fly to

Route

Depart

Return

Price

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Tue 7/29

7:33 am-7:05 pm

2 stops21h 32m

Osaka Itami

Fri 8/8

2:35 pm-7:47 pm

2 stops19h 12m

$753

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Tue 3/11

7:00 am-4:35 pm

1 stop19h 35m

Osaka Kansai Intl

Tue 3/18

6:30 pm-9:51 am

2 stops29h 21m

$848

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Tue 3/11

5:55 am-10:15 pm

2 stops26h 20m

Osaka Kansai Intl

Sun 3/16

5:50 pm-11:09 pm

1 stop19h 19m

$965

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Mon 5/19

7:00 am-5:05 pm

2 stops20h 05m

Osaka Itami

Tue 6/3

12:00 pm-10:15 pm

3 stops48h 15m

$1,124

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Wed 3/12

5:55 am-5:30 pm

2 stops21h 35m

Osaka Itami

Mon 3/17

4:25 pm-11:09 pm

2 stops44h 44m

$1,127

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Sun 4/6

9:39 am-7:25 am

2 stops31h 46m

Osaka Itami

Sun 4/13

6:00 pm-12:20 pm

2 stops32h 20m

$1,158

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Tue 7/29

8:10 am-9:50 pm

2 stops23h 40m

Osaka Kansai Intl

Fri 8/8

6:45 am-4:59 pm

2 stops24h 14m

$1,306

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Wed 3/12

11:55 am-6:20 am

2 stops28h 25m

Osaka Kansai Intl

Tue 3/18

9:25 am-11:09 pm

2 stops27h 44m

$1,430

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sat 4/5

7:45 am-10:15 pm

2 stops24h 30m

Osaka Kansai Intl

Sat 4/12

7:35 am-2:49 pm

3 stops45h 14m

$1,522

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Wed 6/11

1:30 pm-4:25 pm

2 stops36h 55m

Osaka Kansai Intl

Fri 6/27

6:05 pm-12:36 pm

1 stop32h 31m

$1,973

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

Showing 1-10 of 15 results

Compare providers for flights from St. Louis to Osaka

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Osaka in February.

Provider	Price Accuracy	Trust Score*
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
AranGrant	Price Accuracy3 stars	Trust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on St. Louis-Osaka flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Osaka flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Osaka flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on St. Louis-Osaka flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Osaka flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from St. Louis to Osaka

Have a flexible travel schedule? Discover the best time to fly to Osaka from St. Louis with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from St. Louis to Osaka

Get recent, data-driven insights about flights from St. Louis to Osaka including ideal travel times, pricing trends, and more.

Rainfall in Osaka by month

In terms of precipitation, rainfall in Osaka ranges from 1.6 - 7.9 inches per month. June is typically the wettest month, when rainfall can reach 7.9 in. January is typically the driest time to visit Osaka when rainfall is around 1.6 in.

Temperature in Osaka by month

If weather is an important factor for your trip to Osaka, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 84.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 42.8 F).

Reviews of airlines servicing Osaka

See what other customers who have flown with ANA, Japan Airlines and Cathay Pacific from St. Louis to Osaka have to say. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

ANA

8.4

Very good

842 reviews

Reviews

1 / 20

10.0

Excellent

Anonymous,Feb 2025

MNL - HND

Great experience! Roomy economy leg room with foot rest, great crew and accommodations. Highly recommend!

ANA

8.4

Very good

842 reviews

ANA

8.4

Very good

842 reviews

Reviews

1 / 20

10.0

Excellent

Anonymous,Feb 2025

MNL - HND

Great experience! Roomy economy leg room with foot rest, great crew and accommodations. Highly recommend!

Japan Airlines

8.3

Very good

1,440 reviews

ANA

8.4

Very good

842 reviews

Reviews

1 / 20

10.0

Excellent

Anonymous,Feb 2025

MNL - HND

Great experience! Roomy economy leg room with foot rest, great crew and accommodations. Highly recommend!

Cathay Pacific

7.5

Good

821 reviews

ANA

8.4

Very good

842 reviews

Reviews

1 / 20

10.0

Excellent

Anonymous,Feb 2025

MNL - HND

Great experience! Roomy economy leg room with foot rest, great crew and accommodations. Highly recommend!

United Airlines

7.4

Good

8,766 reviews

ANA

8.4

Very good

842 reviews

Reviews

1 / 20

10.0

Excellent

Anonymous,Feb 2025

MNL - HND

Great experience! Roomy economy leg room with foot rest, great crew and accommodations. Highly recommend!

American Airlines

7.2

Good

10,000 reviews

ANA

8.4

Very good

842 reviews

Reviews

1 / 20

10.0

Excellent

Anonymous,Feb 2025

MNL - HND

Great experience! Roomy economy leg room with foot rest, great crew and accommodations. Highly recommend!

Related info for your journey

What airport do you fly from for flights from St. Louis to Osaka?
Located just 12.7 mi from the city center, Lambert-St Louis is the airport most travelers will use when flying to Osaka from St. Louis. Booking flights from Lambert-St Louis (STL) to Osaka should be relatively easy as there are 0 daily outbound flights to Osaka from 2 different airlines.
What are the cheapest airlines flying from St. Louis to Osaka round-trip?
According to our current data, American Airlines ($753), United Airlines ($848), and Japan Airlines ($965) offers the cheapest pricing from St. Louis to Osaka. Users have found that American Airlines is 41% cheaper than the other options available to this destination.
Can I find deals for flights from St. Louis to Osaka that include hotel bookings?
Yes. In addition to deals on St. Louis to Osaka flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from St. Louis to Osaka?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Osaka.
Can I find deals for business class flights from St. Louis to Osaka?
Yes. Cheapflights offers flight deals from St. Louis to Osaka by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from St. Louis to Osaka?
Currently, February is the cheapest month in which you can book a flight from St. Louis to Osaka (average of $912). Flying from St. Louis to Osaka in December is currently the most expensive (average of $1,366). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Nara

Nishinomiya

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Top 2 airlines flying from St. Louis to Osaka

Airline	Cheapest	Average	Flexibility	On-time
Japan Airlines	Cheapest$723	Average$1,214	FlexibilityNo cancel fee	On-time79%
United Airlines	Cheapest$778	Average$1,861	FlexibilityNo cancel fee	On-time69%

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$662+ Cheap flights from St. Louis (STL) to Osaka (OSA)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/15. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from St. Louis to Osaka with Cheapflights

1. Tell us where you want to go

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Cheap flight deals from St. Louis to Osaka

Most accurate provider

Most trusted provider

Round-trip from

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Find flight deals from St. Louis to Osaka

Cheapest flights from St. Louis to OsakaExplore the most affordable flight options available from St. Louis to Osaka. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 20, 2025.

Explore the most affordable flight options available from St. Louis to Osaka. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 20, 2025.

Find flights from St. Louis to Osaka within your budget

Compare providers for flights from St. Louis to Osaka

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Osaka in February.

Best time to book a flight from St. Louis to Osaka

Have a flexible travel schedule? Discover the best time to fly to Osaka from St. Louis with our price prediction graph.

Travel insights for flights from St. Louis to Osaka

Get recent, data-driven insights about flights from St. Louis to Osaka including ideal travel times, pricing trends, and more.

Rainfall in Osaka by month

Plan your trip to Osaka by taking into account the average rainfall totals by month.

Temperature in Osaka by month

Plan your trip to Osaka by taking into account the average temperature totals by month.

Reviews of airlines servicing Osaka

See what other customers who have flown with ANA, Japan Airlines and Cathay Pacific from St. Louis to Osaka have to say. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Osaka. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly from for flights from St. Louis to Osaka?

What are the cheapest airlines flying from St. Louis to Osaka round-trip?

Can I find deals for flights from St. Louis to Osaka that include hotel bookings?

How can I find direct flights from St. Louis to Osaka?

Can I find deals for business class flights from St. Louis to Osaka?

What is the cheapest month to book a flight from St. Louis to Osaka?

Traveling to a place near St. Louis?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for St. Louis to Osaka

See prices for flight routes from nearby airports that may be better suited for you.

Top 2 airlines flying from St. Louis to Osaka

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Cheapest flights from St. Louis to Osaka
Explore the most affordable flight options available from St. Louis to Osaka. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 20, 2025.