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Cheap flights from Illinois to Japan from $349

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 Japan departing on 2/16. 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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Find the cheapest flights from Illinois to Japan

Cheap round-trip flights

Enter your travel dates to find the best prices.
ANA Logo
7:41 am - 5:45 pm
STL
-
HND
19h 04m
1 stop
ANA Logo
6:20 pm - 9:07 pm
HND
-
STL
16h 47m
1 stop
$734ANA
Tue, Mar 3 - Tue, Mar 10
ANA Logo
8:30 am - 4:50 pm
STL
-
HND
17h 20m
1 stop
ANA Logo
7:40 pm - 11:34 pm
HND
-
STL
17h 54m
2 stops
$738ANA
Tue, Mar 3 - Tue, Mar 10
Multiple Airlines Logo
2:51 pm - 2:25 pm
STL
-
NRT
32h 34m
2 stops
Multiple Airlines Logo
2:30 pm - 7:02 am
NRT
-
STL
31h 32m
1 stop
$738Multiple Airlines
Sat, Feb 21 - Thu, Mar 5
American Airlines Logo
5:12 am - 3:30 pm
STL
-
NRT
19h 18m
1 stop
American Airlines Logo
5:30 pm - 7:29 pm
NRT
-
STL
15h 59m
1 stop
$740American Airlines
Tue, Mar 3 - Tue, Mar 10
American Airlines Logo
5:12 am - 3:30 pm
STL
-
NRT
19h 18m
1 stop
American Airlines Logo
5:30 pm - 11:44 pm
NRT
-
STL
20h 14m
2 stops
$745American Airlines
Tue, Mar 3 - Tue, Mar 10
Multiple Airlines Logo
2:51 pm - 2:25 pm
STL
-
NRT
32h 34m
2 stops
Multiple Airlines Logo
2:30 pm - 11:19 pm
NRT
-
STL
22h 49m
1 stop
$752Multiple Airlines
Sat, Feb 21 - Tue, Mar 10
United Airlines Logo
7:41 am - 5:45 pm
STL
-
HND
19h 04m
1 stop
United Airlines Logo
6:20 pm - 9:40 pm
HND
-
STL
18h 20m
1 stop
$766United Airlines
Mon, Feb 23 - Wed, Mar 4
United Airlines Logo
7:41 am - 3:00 pm
STL
-
NRT
16h 19m
1 stop
United Airlines Logo
4:45 pm - 10:25 pm
NRT
-
STL
20h 40m
1 stop
$767United Airlines
Mon, Feb 23 - Fri, Mar 6
Air Canada Logo
4:05 pm - 3:50 pm
STL
-
NRT
33h 45m
1 stop
Air Canada Logo
5:35 pm - 8:05 pm
NRT
-
STL
16h 30m
1 stop
$768Air Canada
Sat, Apr 25 - Fri, May 8
Air Canada Logo
4:05 pm - 3:50 pm
STL
-
NRT
33h 45m
1 stop
Air Canada Logo
5:35 pm - 8:05 pm
NRT
-
STL
16h 30m
1 stop
$769Air Canada
Sat, Apr 25 - Fri, May 8

United Airlines flights from Illinois to Japan

Our best United Airlines deals on Illinois to Japan flight tickets
United Airlines
Feb 23
STL7:41 amLambert-St Louis
19h 04m
1 stop
HND5:45 pmTokyo Haneda
Mar 4
HND6:20 pmTokyo Haneda
18h 20m
1 stop
STL9:40 pmLambert-St Louis
$766
United Airlines
Feb 23
STL7:41 amLambert-St Louis
16h 19m
1 stop
NRT3:00 pmTokyo Narita
Mar 6
NRT4:45 pmTokyo Narita
20h 40m
1 stop
STL10:25 pmLambert-St Louis
$767
United Airlines
Feb 23
STL8:30 amLambert-St Louis
17h 20m
1 stop
HND4:50 pmTokyo Haneda
Mar 10
HND7:40 pmTokyo Haneda
17h 54m
2 stops
STL11:34 pmLambert-St Louis
$771

Air Canada flights from Illinois to Japan

Our best Air Canada deals on Illinois to Japan flight tickets
Air Canada
Feb 7
STL4:49 pmLambert-St Louis
32h 41m
2 stops
NRT4:30 pmTokyo Narita
Feb 11
NRT6:15 pmTokyo Narita
41h 50m
2 stops
STL9:05 pmLambert-St Louis
$749
Air Canada
Feb 9
STL6:40 pmLambert-St Louis
30h 50m
2 stops
NRT4:30 pmTokyo Narita
Feb 27
NRT6:45 pmTokyo Narita
35h 44m
1 stop
STL3:29 pmLambert-St Louis
$765
Air Canada
Apr 25
STL4:05 pmLambert-St Louis
33h 45m
1 stop
NRT3:50 pmTokyo Narita
May 8
NRT5:35 pmTokyo Narita
16h 30m
1 stop
STL8:05 pmLambert-St Louis
$768

momondo Fare Finder

 
Customize your flight search to find flights from Illinois to Japan 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 February 3, 2026.
Use the filters below to find and compare flights from Illinois to Japan that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Tue 3/3

7:41 am-5:45 pm

1 stop19h 04m

Tokyo Haneda

Tue 3/10

6:20 pm-9:07 pm

1 stop16h 47m

$734

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Tue 3/3

8:30 am-4:50 pm

1 stop17h 20m

Tokyo Haneda

Tue 3/10

7:40 pm-11:34 pm

2 stops17h 54m

$738

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Sat 2/21

2:51 pm-2:25 pm

2 stops32h 34m

Tokyo Narita

Thu 3/5

2:30 pm-7:02 am

1 stop31h 32m

$738

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Tue 3/3

5:12 am-3:30 pm

1 stop19h 18m

Tokyo Narita

Tue 3/10

5:30 pm-7:29 pm

1 stop15h 59m

$740

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Tue 3/3

5:12 am-3:30 pm

1 stop19h 18m

Tokyo Narita

Tue 3/10

5:30 pm-11:44 pm

2 stops20h 14m

$745

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Sat 2/21

2:51 pm-2:25 pm

2 stops32h 34m

Tokyo Narita

Tue 3/10

2:30 pm-11:19 pm

1 stop22h 49m

$752

St. LouisTokyo

STL - HND

STLHND

Lambert-St Louis

Mon 2/23

7:41 am-5:45 pm

1 stop19h 04m

Tokyo Haneda

Wed 3/4

6:20 pm-9:40 pm

1 stop18h 20m

$766

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Mon 2/23

7:41 am-3:00 pm

1 stop16h 19m

Tokyo Narita

Fri 3/6

4:45 pm-10:25 pm

1 stop20h 40m

$767

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Sat 4/25

4:05 pm-3:50 pm

1 stop33h 45m

Tokyo Narita

Fri 5/8

5:35 pm-8:05 pm

1 stop16h 30m

$768

St. LouisTokyo

STL - NRT

STLNRT

Lambert-St Louis

Sat 4/25

4:05 pm-3:50 pm

1 stop33h 45m

Tokyo Narita

Fri 5/8

5:35 pm-8:05 pm

1 stop16h 30m

$769

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 Japan from

How to get the cheapest flight ticket from Illinois to Japan

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 Japan?

The month of September is, on average, the cheapest month to fly to Japan from Illinois, with most prices found around $990. If you aren’t able to travel to Japan during the month of September, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $1,006.

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

On average, the least expensive day to fly to Japan from Illinois is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $1,056. However, this price may fluctuate depending on the airline, the season, and holidays. Flights from Illinois to Japan on a Saturday will generally be more expensive and average around $1,502. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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

Flying to Japan from Illinois in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $1,064 when looking at flights departing in the afternoon. In the evening is when there is more demand to fly to Japan, so prices are often more expensive at around $1,533 per ticket.

What is the cheapest Illinois to Japan flight route?

Fly from Chicago O'Hare Intl to Tokyo Narita for the best Illinois - Japan flight prices

How far in advance should I book a flight to Japan?

You are more likely to see cheaper flights to Japan from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to Japan for around $1,254 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Japan from Illinois for as low as $1,041 on momondo.

What cabin class options are available on Illinois to Japan flights?

There are 4 cabin classes available to choose from on Illinois to Japan flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Illinois to Japan flights?

You could potentially save up to 13% on your flight if you consider stops on a Illinois to Japan flight.

Cheap Illinois to Japan flight deals and tips

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

Best Price Found

$528

Fastest flight time

12h 45m

Direct flights

Every day

Airports in Japan

202 airports
The best one-way flight to Japan from Illinois in the past 72 hours is $528. The best round-trip flight deal from Illinois to Japan found on momondo in the last 72 hours is $969.
The fastest flight from Illinois to Japan takes 12h 45m
Direct flights go from Illinois to Japan every day.
There are 202 airports in Japan. From Illinois there are direct flights to Tokyo Narita (NRT), Tokyo Haneda (HND).
Search flight deals

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

    Prices for flights from Illinois to Japan are refreshed on a daily basis.

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

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

    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 Japan.

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

    The travel and health documents you'll need for your trip to Japan may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Japan. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Illinois to Japan?

Best airlines flying from Illinois to Japan

Compare and see reviews for airlines that fly from Illinois to Japan with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $613Free CancellationRating
7.9
8,135 reviews
Search Delta flights
Cathay PacificPriceFrom $709Free CancellationRating
7.6
1,155 reviews
Search Cathay Pacific flights
United AirlinesPriceFrom $781Free CancellationRating
7.4
9,232 reviews
Search United Airlines flights
Air CanadaPriceFrom $804Free CancellationRating
7.1
10,676 reviews
Search Air Canada flights
Hawaiian AirlinesPriceFrom $880Free CancellationRating
7.8
2,830 reviews
Search Hawaiian Airlines flights
ANAPriceFrom $915Free CancellationRating
8.4
1,082 reviews
Search ANA flights
Japan AirlinesPriceFrom $939Free CancellationRating
8.3
1,697 reviews
Search Japan Airlines flights
EVA AirPriceFrom $978Free CancellationRating
8.4
1,342 reviews
Search EVA Air flights
American AirlinesPriceFrom $1,001Free CancellationRating
7.2
11,213 reviews
Search American Airlines flights

Why use momondo?

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

It is quick and easy to find Illinois to Japan flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Japan that suits you.

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

Flights from Illinois to Japan 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 Illinois to Japan?

momondo provides multiple filters to help you find the best flight to Japan from Illinois. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Of course. momondo tracks the price of Illinois to Japan 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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