HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Osaka

$358+ 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 2/15. Fares are subject to change and may not be available on all flights or dates of travel.
STL — OSA
Feb 11 — Feb 181
Wed 2/11
Wed 2/18
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from St. Louis to Osaka with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from St. Louis to Osaka

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Osaka (OSA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 12, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$711
(Air Canada)

One-way from

$358
(Air Canada)

Popular in

May

Cheapest in

February
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.
Search Deals
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. 13% potential increase in price ($203 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($57 potential savings vs. average RT price).
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 January 12, 2026.

This Air Canada deal was found by Cheapflights users on 1/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/104:05 pm
STL
-
KIX
2 stops39h 15m
Multiple Airlines
Tue 2/173:00 pm
KIX
-
STL
2 stops39h 29m
Multiple Airlines
Deal found 1/11$711
This Air Canada deal was found by Cheapflights users on 1/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/84:05 pm
STL
-
KIX
2 stops39h 15m
Multiple Airlines
Sun 2/158:00 am
KIX
-
STL
2 stops46h 29m
Multiple Airlines
Deal found 1/11$752
This American Airlines deal was found by Cheapflights users on 1/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/37:04 am
STL
-
ITM
2 stops19h 31m
American Airlines
Thu 2/193:25 pm
ITM
-
STL
2 stops19h 04m
American Airlines
Deal found 1/10$756
This Delta deal was found by Cheapflights users on 1/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/36:35 am
STL
-
KIX
2 stops23h 10m
Delta
Thu 2/129:00 am
KIX
-
STL
2 stops26h 41m
Delta
Deal found 1/12$764
This CheapOair deal was found by Cheapflights users on 1/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/104:05 pm
STL
-
ITM
2 stops37h 25m
Multiple Airlines
Tue 2/171:40 pm
ITM
-
STL
2 stops40h 49m
Multiple Airlines
Deal found 1/11$772
This Air Canada deal was found by Cheapflights users on 1/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/34:05 pm
STL
-
KIX
2 stops39h 15m
Multiple Airlines
Thu 2/193:00 pm
KIX
-
STL
2 stops39h 29m
Multiple Airlines
Deal found 1/10$776
This American Airlines deal was found by Cheapflights users on 1/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/147:15 am
STL
-
ITM
2 stops21h 40m
American Airlines
Thu 1/293:25 pm
ITM
-
STL
2 stops19h 04m
American Airlines
Deal found 1/10$795
This Gotogate deal was found by Cheapflights users on 1/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/254:05 pm
STL
-
KIX
2 stops54h 20m
Multiple Airlines
Wed 3/49:10 pm
KIX
-
STL
2 stops57h 19m
Multiple Airlines
Deal found 1/11$797
This Air Canada deal was found by Cheapflights users on 1/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/184:15 pm
STL
-
ITM
2 stops37h 05m
Air Canada
Wed 11/254:00 pm
ITM
-
STL
2 stops38h 30m
Air Canada
Deal found 1/12$812
This CheapOair deal was found by Cheapflights users on 1/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/84:05 pm
STL
-
ITM
2 stops37h 25m
Multiple Airlines
Sun 2/152:40 pm
ITM
-
STL
2 stops39h 49m
Multiple Airlines
Deal found 1/11$824
This United Airlines deal was found by Cheapflights users on 1/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/257:41 am
STL
-
KIX
2 stops41h 59m
United Airlines
Wed 3/46:35 pm
KIX
-
STL
2 stops31h 01m
United Airlines
Deal found 1/11$825
This Air Canada deal was found by Cheapflights users on 1/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/284:15 pm
STL
-
KIX
2 stops59h 25m
Air Canada
Thu 11/267:25 pm
KIX
-
STL
2 stops42h 29m
Air Canada
Deal found 1/11$826

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to Osaka that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 12, 2026.
Use the filters below to find and compare flights from St. Louis to Osaka that are best for you.

Fly from

St. Louis

Fly to

Osaka

Route

Depart

Return

Price

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Tue 2/10

4:05 pm-10:20 pm

2 stops39h 15m

Osaka Kansai Intl

Tue 2/17

3:00 pm-3:29 pm

2 stops39h 29m

$711

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Tue 2/3

7:04 am-5:35 pm

2 stops19h 31m

Osaka Itami

Thu 2/19

3:25 pm-7:29 pm

2 stops19h 04m

$756

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Tue 2/3

6:35 am-8:45 pm

2 stops23h 10m

Osaka Kansai Intl

Thu 2/12

9:00 am-8:41 pm

2 stops26h 41m

$764

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Tue 2/3

4:05 pm-10:20 pm

2 stops39h 15m

Osaka Kansai Intl

Thu 2/19

3:00 pm-3:29 pm

2 stops39h 29m

$776

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Wed 2/25

7:41 am-4:40 pm

2 stops41h 59m

Osaka Kansai Intl

Wed 3/4

6:35 pm-10:36 am

2 stops31h 01m

$825

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Sun 2/15

4:05 pm-8:20 pm

2 stops37h 15m

Osaka Itami

Sat 2/28

3:25 pm-3:29 pm

2 stops39h 04m

$834

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sun 2/8

6:45 am-4:40 pm

1 stop18h 55m

Osaka Kansai Intl

Sun 2/15

8:20 am-8:23 pm

2 stops27h 03m

$852

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Thu 2/26

4:05 pm-8:20 pm

2 stops37h 15m

Osaka Itami

Thu 3/5

2:00 pm-3:29 pm

2 stops40h 29m

$867

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Tue 2/10

7:04 am-10:20 pm

2 stops24h 16m

Osaka Kansai Intl

Tue 2/17

8:25 pm-1:43 pm

2 stops32h 18m

$868

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Thu 2/19

7:00 am-7:55 pm

2 stops21h 55m

Osaka Itami

Mon 2/23

2:40 pm-11:59 pm

2 stops24h 19m

$869

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/10

Showing 1-10 of 29 results
1
2
3

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 January.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
AranGrantPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*2 stars

*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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on St. Louis-Osaka flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Osaka
No data available for this route at this time. Please check back soon.

Reviews of airlines servicing Osaka

Get insights into the airlines that provide service to Osaka. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Osaka. Reviews last updated January 12, 2026.
Read through reviews of airlines operating flights from St. Louis to Osaka, such as ANA, Japan Airlines, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
ANA
8.4
Very good
1,068 reviews

Crew

8.7

Entertainment

7.9

Comfort

8.2

Overall

8.4

Boarding

8.5

Food

7.7

Reviews

1 / 20
10.0
Excellent

Lindsey,Jan 2026

CGK - HND

All of the flight attendants were very nice & attentive. The bathrooms were kept very clean. We have no complaints!
ANA
8.4
Very good
1,068 reviews
ANA
8.4
Very good
1,068 reviews

Crew

8.7

Entertainment

7.9

Comfort

8.2

Overall

8.4

Boarding

8.5

Food

7.7

Reviews

1 / 20
10.0
Excellent

Lindsey,Jan 2026

CGK - HND

All of the flight attendants were very nice & attentive. The bathrooms were kept very clean. We have no complaints!
Japan Airlines
8.3
Very good
1,680 reviews
ANA
8.4
Very good
1,068 reviews

Crew

8.7

Entertainment

7.9

Comfort

8.2

Overall

8.4

Boarding

8.5

Food

7.7

Reviews

1 / 20
10.0
Excellent

Lindsey,Jan 2026

CGK - HND

All of the flight attendants were very nice & attentive. The bathrooms were kept very clean. We have no complaints!
United Airlines
7.4
Good
9,149 reviews
ANA
8.4
Very good
1,068 reviews

Crew

8.7

Entertainment

7.9

Comfort

8.2

Overall

8.4

Boarding

8.5

Food

7.7

Reviews

1 / 20
10.0
Excellent

Lindsey,Jan 2026

CGK - HND

All of the flight attendants were very nice & attentive. The bathrooms were kept very clean. We have no complaints!

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?

    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 0 different airlines.

  • How long is the flight from St. Louis to Osaka?

    For as low as $756, American Airlines can have you in Osaka from St. Louis in 19h 31m. Airlines will cover a distance of 6568 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • 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.

See more FAQs

Traveling to a place near Osaka?

Book flights to Osaka if you plan to visit one of these locations
Nara

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for St. Louis to Osaka

See prices for flight routes from nearby airports that may be better suited for you.
St. Louis to Kansai Intl flights
Kansas City to Osaka Itami flights
Kansas City to Kansai Intl flights

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
Site
©2026 Cheapflights