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Cheap flights from Illinois to Osaka from $368

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to Osaka 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.
1 adult
0 bags

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Find the cheapest flights from Illinois to Osaka

Cheap round-trip flights

Enter your travel dates to find the best prices.
ANA Logo
11:20 am - 7:30 amSTL-ITM
29h 10m2 stops
ANA Logo
8:00 am - 12:25 pmITM-STL
19h 25m2 stops
$690ANA
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Tue, Feb 3 - Thu, Feb 19
ANA Logo
7:41 am - 6:55 pmSTL-ITM
20h 14m2 stops
ANA Logo
2:00 pm - 7:19 pmITM-STL
20h 19m2 stops
$691ANA
Find Deal
Sun, Feb 15 - Sat, Feb 28
Multiple Airlines Logo
9:57 am - 7:30 amSTL-ITM
30h 33m2 stops
Multiple Airlines Logo
1:00 pm - 2:29 pmITM-STL
40h 29m2 stops
$700Multiple Airlines
Find Deal
Tue, Feb 10 - Sat, Feb 28
United Airlines Logo
9:55 am - 6:10 pmSTL-ITM
41h 15m2 stops
United Airlines Logo
1:00 pm - 8:23 pmITM-STL
22h 23m2 stops
$709United Airlines
Find Deal
Sun, Feb 15 - Sat, Feb 28
United Airlines Logo
7:41 am - 6:10 pmSTL-ITM
43h 29m2 stops
United Airlines Logo
1:00 pm - 8:23 pmITM-STL
22h 23m2 stops
$710United Airlines
Find Deal
Thu, Feb 12 - Sat, Feb 28
American Airlines Logo
7:00 am - 7:55 pmSTL-ITM
21h 55m2 stops
American Airlines Logo
3:30 pm - 7:29 pmITM-STL
18h 59m2 stops
$810American Airlines
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Tue, Dec 2 - Tue, Dec 9
Japan Airlines Logo
6:10 am - 6:50 pmSTL-KIX
21h 40m1 stop
Japan Airlines Logo
7:00 am - 5:56 pmKIX-STL
25h 56m2 stops
$822Japan Airlines
Find Deal
Thu, Feb 12 - Sat, Feb 28
Japan Airlines Logo
3:20 pm - 8:25 amSTL-KIX
26h 05m2 stops
Japan Airlines Logo
5:50 pm - 11:08 pmKIX-STL
20h 18m1 stop
$827Japan Airlines
Find Deal
Tue, Feb 3 - Thu, Feb 19
American Airlines Logo
6:10 am - 6:50 pmSTL-KIX
21h 40m1 stop
American Airlines Logo
5:50 pm - 11:08 pmKIX-STL
20h 18m1 stop
$841American Airlines
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Sun, Feb 15 - Sat, Feb 28
Multiple Airlines Logo
6:30 am - 8:40 amORD-KIX
35h 10m2 stops
Multiple Airlines Logo
9:00 am - 12:59 amKIX-ORD
30h 59m2 stops
$860Multiple Airlines
Find Deal
Mon, Nov 17 - Thu, Nov 20

Japan Airlines flights from Illinois to Osaka

Our best Japan Airlines deals on Illinois to Osaka flight tickets
Japan Airlines
Feb 12
STL6:10 amLambert-St Louis
21h 40m
1 stop
KIX6:50 pmOsaka Kansai Intl
Feb 28
KIX7:00 amOsaka Kansai Intl
25h 56m
2 stops
STL5:56 pmLambert-St Louis
$822
Find similar
Japan Airlines
Feb 3
STL3:20 pmLambert-St Louis
26h 05m
2 stops
KIX8:25 amOsaka Kansai Intl
Feb 19
KIX5:50 pmOsaka Kansai Intl
20h 18m
1 stop
STL11:08 pmLambert-St Louis
$827
Find similar
Japan Airlines
Feb 12
STL12:58 pmLambert-St Louis
28h 27m
2 stops
KIX8:25 amOsaka Kansai Intl
Feb 28
KIX7:00 amOsaka Kansai Intl
19h 10m
2 stops
STL11:10 amLambert-St Louis
$831
Find similar

Cathay Pacific flights from Illinois to Osaka

Our best Cathay Pacific deals on Illinois to Osaka flight tickets
Cathay Pacific
Apr 7
ORD4:00 pmChicago O'Hare Intl
24h 40m
1 stop
KIX6:40 amOsaka Kansai Intl
Apr 15
KIX6:35 pmOsaka Kansai Intl
33h 50m
1 stop
ORD2:25 pmChicago O'Hare Intl
$866
Find similar
Cathay Pacific
Feb 24
ORD2:35 pmChicago O'Hare Intl
33h 40m
1 stop
KIX3:15 pmOsaka Kansai Intl
Mar 4
KIX10:00 amOsaka Kansai Intl
41h 55m
1 stop
ORD12:55 pmChicago O'Hare Intl
$871
Find similar
Cathay Pacific
Apr 7
ORD4:00 pmChicago O'Hare Intl
33h 15m
1 stop
KIX3:15 pmOsaka Kansai Intl
Apr 15
KIX4:20 pmOsaka Kansai Intl
36h 05m
2 stops
ORD2:25 pmChicago O'Hare Intl
$882
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Illinois 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, momondo users made 832,500 searches. Data last updated October 20, 2025.
Use the filters below to find and compare flights from Illinois to Osaka that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Tue 2/3

11:20 am-7:30 am

2 stops29h 10m

Osaka Itami

Thu 2/19

8:00 am-12:25 pm

2 stops19h 25m

$690

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Sun 2/15

7:41 am-6:55 pm

2 stops20h 14m

Osaka Itami

Sat 2/28

2:00 pm-7:19 pm

2 stops20h 19m

$691

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Tue 2/10

9:57 am-7:30 am

2 stops30h 33m

Osaka Itami

Sat 2/28

1:00 pm-2:29 pm

2 stops40h 29m

$700

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Sun 2/15

9:55 am-6:10 pm

2 stops41h 15m

Osaka Itami

Sat 2/28

1:00 pm-8:23 pm

2 stops22h 23m

$709

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Thu 2/12

7:41 am-6:10 pm

2 stops43h 29m

Osaka Itami

Sat 2/28

1:00 pm-8:23 pm

2 stops22h 23m

$710

St. LouisOsaka

STL - ITM

STLITM

Lambert-St Louis

Tue 12/2

7:00 am-7:55 pm

2 stops21h 55m

Osaka Itami

Tue 12/9

3:30 pm-7:29 pm

2 stops18h 59m

$810

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Thu 2/12

6:10 am-6:50 pm

1 stop21h 40m

Osaka Kansai Intl

Sat 2/28

7:00 am-5:56 pm

2 stops25h 56m

$822

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Tue 2/3

3:20 pm-8:25 am

2 stops26h 05m

Osaka Kansai Intl

Thu 2/19

5:50 pm-11:08 pm

1 stop20h 18m

$827

St. LouisOsaka

STL - KIX

STLKIX

Lambert-St Louis

Sun 2/15

6:10 am-6:50 pm

1 stop21h 40m

Osaka Kansai Intl

Sat 2/28

5:50 pm-11:08 pm

1 stop20h 18m

$841

ChicagoOsaka

ORD - KIX

ORDKIX

Chicago O'Hare Intl

Mon 11/17

6:30 am-8:40 am

2 stops35h 10m

Osaka Kansai Intl

Thu 11/20

9:00 am-12:59 am

2 stops30h 59m

$860

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Osaka from

How to get the cheapest flight ticket from Illinois to Osaka

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 Osaka?

In general, September is the cheapest month to fly from Illinois to Osaka. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $1,065. If you are unable to visit Osaka during the month of September, then departing from Illinois during the month October is also very affordable. Most momondo users find prices during this month for around $1,081.

What is the cheapest day to depart on your flight to Osaka?

According to our data, Tuesday is the cheapest day to fly to Osaka from Illinois. The lowest ticket price found for a Tuesday departure recently was $1,283. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Illinois to Osaka for around $1,701.

What is the cheapest time of day to depart on your flight to Osaka?

Our data shows that the cheapest Illinois to Osaka flights are usually those with departure times in the afternoon. Our users have found flights to Osaka in the afternoon for as low as $1,034. Flights to Osaka are more costly at noon, with an average ticket price of $1,620. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.

Can stopping save me money on Illinois to Osaka flights?

You could potentially save up to 49% on your flight if you consider stops on a Illinois to Osaka flight.

Cheap Illinois to Osaka flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Illinois to Osaka

Direct flights

None
There are no direct flights from Illinois to Osaka. There are no popular flight routes from Illinois to Osaka.
Search flight deals

  • When did momondo last update prices for flights from Illinois to Osaka?

    Prices for flights from Illinois to Osaka refresh daily.

  • How many operators does momondo search for flights from Illinois to Osaka?

  • How old do you have to be to fly from Illinois to Osaka?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Illinois to Osaka.

  • What documentation or ID do you need to fly to Osaka?

    The travel and health documents required for your trip to Osaka can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Osaka. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Illinois to Osaka

Compare and see reviews for airlines that fly from Illinois to Osaka with momondo
Airline
Rating
Free Cancellation
Price
ANAPriceFrom $984Free CancellationRating
8.4
990 reviews
Search ANA flights
Air CanadaPriceFrom $1,025Free CancellationRating
7.1
10,337 reviews
Search Air Canada flights
EVA AirPriceFrom $1,097Free CancellationRating
8.4
1,255 reviews
Search EVA Air flights
United AirlinesPriceFrom $1,570Free CancellationRating
7.4
8,991 reviews
Search United Airlines flights

Traveling to a place near Osaka?

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

Why use momondo?

Why should I use momondo to find a flight deal from Illinois to Osaka?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Illinois to Osaka. momondo saves you time and could save you money on your trip.

Can I find flights from Illinois to Osaka with flexible booking policies on momondo?

Yes. All flights to Osaka from Illinois on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Illinois to Osaka?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Osaka from Illinois.

I’m not ready to book a flight from Illinois to Osaka right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Illinois to Osaka flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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Find better results for your trip to Japan

Fly into one of these airports located in Osaka

Airports listed have a maximum distance of 22.5 mi from Osaka
Osaka Itami Airport
Osaka Kansai Intl Airport