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Southeast Asia

$342+ Cheap flights from Illinois to Southeast Asia

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 2/26. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BKK
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
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Cheap flight deals from Illinois to Southeast Asia

Keep the following information in mind while searching for Illinois to Southeast Asia flight deals. Data was last updated September 17, 2025.

Round-trip from

$675
(CrystalTravel)

One-way from

$342
(Expedia)

Popular in

December

Cheapest in

September

Average price

$891
From Illinois to Southeast Asia
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One-way flight from Illinois to Southeast Asia
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Highest demand for flights based on searches. 10% potential increase in price ($132 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($63 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Illinois to Southeast Asia

Cheapest flights from Illinois to Southeast Asia
Explore the most affordable flight options available from Illinois to Southeast Asia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 17, 2025.

This Gotogate deal was found by Cheapflights users on 9/17. 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.
Mon 9/2212:10 pmORD - BKK
1 stop23h 00mMultiple Airlines
Sun 10/511:30 pmBKK - ORD
1 stop22h 00mMultiple Airlines
Deal found 9/17$677
This Ovago deal was found by Cheapflights users on 9/16. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/214:00 pmORD - BKK
1 stop19h 50mCathay Pacific
Tue 11/44:55 pmBKK - ORD
1 stop33h 00mCathay Pacific
Deal found 9/16$680
This FlightHub deal was found by Cheapflights users on 9/15. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/2711:45 pmORD - BKK
1 stop27h 40mTurkish Airlines
Tue 10/711:00 amBKK - ORD
1 stop34h 40mTurkish Airlines
Deal found 9/15$681
This Ovago deal was found by Cheapflights users on 9/15. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/32:35 pmORD - BKK
1 stop31h 05mCathay Pacific
Wed 11/1212:45 pmBKK - ORD
1 stop37h 15mCathay Pacific
Deal found 9/15$682
This Flighttix deal was found by Cheapflights users on 9/16. 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 Flighttix is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2212:40 pmORD - BKK
1 stop27h 55mUnited Airlines
Sun 10/59:35 amBKK - ORD
1 stop41h 35mUnited Airlines
Deal found 9/16$683
This oojo deal was found by Cheapflights users on 9/14. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/214:00 pmORD - SGN
1 stop37h 20mCathay Pacific
Tue 11/117:35 pmSGN - ORD
1 stop30h 25mCathay Pacific
Deal found 9/14$683
This Ovago deal was found by Cheapflights users on 9/15. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/14:00 pmORD - BKK
1 stop35h 25mCathay Pacific
Sun 10/1212:30 pmBKK - ORD
1 stop37h 55mCathay Pacific
Deal found 9/15$684
This iWofly deal was found by Cheapflights users on 9/17. 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 iWofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/511:15 amORD - BKK
1 stop24h 30mKorean Air
Tue 11/189:30 pmBKK - ORD
1 stop24h 00mKorean Air
Deal found 9/17$685
This oojo deal was found by Cheapflights users on 9/14. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/132:40 pmORD - SGN
1 stop20h 40mCathay Pacific
Wed 11/1911:35 amSGN - ORD
1 stop38h 25mCathay Pacific
Deal found 9/14$685
This Ovago deal was found by Cheapflights users on 9/16. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/112:35 pmORD - BKK
1 stop20h 40mCathay Pacific
Tue 11/254:55 pmBKK - ORD
1 stop33h 00mCathay Pacific
Deal found 9/16$688
This Ovago deal was found by Cheapflights users on 9/16. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/172:35 pmORD - BKK
1 stop34h 30mCathay Pacific
Tue 11/253:05 pmBKK - ORD
1 stop34h 50mCathay Pacific
Deal found 9/16$690
This Ovago deal was found by Cheapflights users on 9/16. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/252:35 pmORD - BKK
1 stop20h 35mCathay Pacific
Wed 12/2412:45 pmBKK - ORD
1 stop37h 10mCathay Pacific
Deal found 9/16$691

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois to Southeast Asia 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 September 17, 2025.
Use the filters below to find and compare flights from Illinois to Southeast Asia that are best for you.

Fly from

Illinois

Fly to

Southeast Asia

Route

Depart

Return

Price

ChicagoBangkok

ORD - BKK

ORDBKK

Chicago O'Hare Intl

Wed 2/18

11:25 am-12:45 am

1 stop24h 20m

Bangkok Suvarnabhumi

Wed 3/25

12:55 am-9:40 am

1 stop20h 45m

$699

ChicagoBangkok

ORD - BKK

ORDBKK

Chicago O'Hare Intl

Tue 11/25

11:15 am-11:20 pm

1 stop23h 05m

Bangkok Suvarnabhumi

Tue 12/9

11:15 pm-8:30 am

1 stop22h 15m

$699

ChicagoBangkok

ORD - BKK

ORDBKK

Chicago O'Hare Intl

Mon 1/26

7:30 am-12:45 am

2 stops28h 15m

Bangkok Suvarnabhumi

Wed 2/11

12:55 am-9:14 pm

2 stops33h 19m

$710

ChicagoBangkok

MDW - BKK

MDWBKK

Chicago Midway

Wed 9/24

9:35 am-1:05 am

2 stops27h 30m

Bangkok Suvarnabhumi

Wed 10/22

2:35 am-10:14 pm

2 stops31h 39m

$710

ChicagoBangkok

MDW - BKK

MDWBKK

Chicago Midway

Mon 9/22

9:20 am-11:25 pm

2 stops26h 05m

Bangkok Suvarnabhumi

Wed 11/5

12:55 am-12:28 pm

2 stops24h 33m

$710

ChicagoBangkok

MDW - BKK

MDWBKK

Chicago Midway

Wed 9/24

9:35 am-1:05 am

2 stops27h 30m

Bangkok Suvarnabhumi

Tue 10/21

9:50 am-10:14 pm

2 stops24h 24m

$710

ChicagoBangkok

MDW - BKK

MDWBKK

Chicago Midway

Thu 9/25

9:20 am-1:05 am

2 stops27h 45m

Bangkok Suvarnabhumi

Tue 10/21

9:50 am-10:14 pm

2 stops24h 24m

$710

ChicagoBangkok

MDW - BKK

MDWBKK

Chicago Midway

Mon 9/22

9:20 am-1:05 am

2 stops27h 45m

Bangkok Suvarnabhumi

Tue 10/21

11:30 pm-10:14 pm

2 stops34h 44m

$710

ChicagoBangkok

ORD - BKK

ORDBKK

Chicago O'Hare Intl

Wed 10/29

8:14 pm-11:25 am

2 stops27h 11m

Bangkok Suvarnabhumi

Wed 1/28

9:10 am-5:15 am

2 stops33h 05m

$712

ChicagoBangkok

ORD - BKK

ORDBKK

Chicago O'Hare Intl

Mon 3/2

4:25 pm-5:10 am

1 stop23h 45m

Bangkok Suvarnabhumi

Thu 4/2

3:40 pm-6:28 am

2 stops26h 48m

$719

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/16

Showing 1-10 of 60 results
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Best time to book a flight from Illinois to Southeast Asia

Have a flexible travel schedule? Discover the best time to fly to Southeast Asia from Illinois 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 Illinois to Southeast Asia

What is the cheapest month to book a flight from Illinois to Southeast Asia?

Currently, September is the cheapest month in which you can book a flight from Illinois to Southeast Asia (average of $900). Flying from Illinois to Southeast Asia in December is currently the most expensive (average of $1,507). 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 time of day to fly from IL to YJX?

Find hourly flight availability from Illinois to Southeast Asia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 17, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to Southeast Asia as you normally would.

Related info for your journey

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

  • How long is the flight from Illinois to Southeast Asia?

    Korean Air, Delta, and United Airlines can get you from Illinois to Southeast Asia in just under 24h 20m. Your travel time can differ by up to 3h 55m. There are 8545 mi between Illinois and Southeast Asia. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from Illinois to Southeast Asia one-way?

    The cheapest airline one-way is Cathay Pacific, with whom users have recently found tickets for as low as $359. However, be on the lookout for offers from United Airlines and Turkish Airlines, as they are both options that can get you from Illinois to Southeast Asia for a low price.

  • Can I find deals for flights from Illinois to Southeast Asia that include hotel bookings?

    Yes. In addition to deals on Illinois to Southeast Asia flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Illinois to Southeast Asia?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to Southeast Asia.

  • Can I find deals for business class flights from Illinois to Southeast Asia?

    Yes. Cheapflights offers flight deals from Illinois to Southeast Asia 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 Illinois to Southeast Asia?

    Currently, September is the cheapest month in which you can book a flight from Illinois to Southeast Asia (average of $900). Flying from Illinois to Southeast Asia in December is currently the most expensive (average of $1,507). 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

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Alternative routes for Illinois to Southeast Asia

See prices for flight routes from nearby airports that may be better suited for you.
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Top 10 airlines flying from Illinois to Southeast Asia

Discover the top 10 airlines that operate flights from Illinois to Southeast Asia. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
EmiratesCheapest$503Average$1,391FlexibilityNo cancel feeOn-time75%
Air IndiaCheapest$619Average$923FlexibilityNo cancel feeOn-timeN/A
ANACheapest$631Average$1,075FlexibilityNo cancel feeOn-time80%
Cathay PacificCheapest$662Average$1,034FlexibilityNo cancel feeOn-time72%
DeltaCheapest$681Average$1,298FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$709Average$1,168FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$710Average$1,268FlexibilityNo cancel feeOn-time71%
Korean AirCheapest$722Average$1,182FlexibilityNo cancel feeOn-time81%
Turkish AirlinesCheapest$729Average$1,006FlexibilityNo cancel feeOn-time77%
Singapore AirlinesCheapest$746Average$1,758FlexibilityNo cancel feeOn-time81%

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