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Cheap flights from Illinois to Chennai from ₹ 41,719

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 9/9. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — MAA
31 Jul — 7 Aug1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Illinois to Chennai

Enter your travel dates to find the best prices.

Cheapest flights from Illinois to Chennai
Explore the most affordable flight options available from Illinois to Chennai. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 1 July 2026.

Wed 16/911:01
STL
-
MAA
2 stops34h 54m
Etihad Airways
Sun 27/904:05
MAA
-
STL
2 stops27h 09m
Etihad Airways
Deal found 29/6₹ 96,682
Sun 27/918:00
STL
-
MAA
2 stops46h 20m
Etihad Airways
Wed 2/1216:10
MAA
-
STL
2 stops32h 49m
Etihad Airways
Deal found 26/6₹ 97,344
Tue 1/909:00
ORD
-
MAA
2 stops31h 20m
Multiple Airlines
Sat 26/904:05
MAA
-
ORD
1 stop21h 30m
Multiple Airlines
Deal found 29/6₹ 101,034
Sat 5/911:10
ORD
-
MAA
2 stops33h 45m
Oman Air
Fri 25/908:15
MAA
-
ORD
2 stops33h 05m
Oman Air
Deal found 29/6₹ 101,223
Sat 15/806:00
ORD
-
MAA
2 stops34h 20m
Qatar Airways
Tue 29/904:05
MAA
-
ORD
1 stop21h 30m
Qatar Airways
Deal found 30/6₹ 101,696
Sat 26/921:10
ORD
-
MAA
1 stop19h 10m
Etihad Airways
Mon 28/921:55
MAA
-
ORD
1 stop21h 10m
Etihad Airways
Deal found 30/6₹ 101,885
Thu 24/919:20
ORD
-
MAA
2 stops29h 20m
Multiple Airlines
Tue 29/904:05
MAA
-
ORD
1 stop21h 30m
Multiple Airlines
Deal found 30/6₹ 102,074
Thu 19/1120:20
ORD
-
MAA
1 stop36h 05m
Etihad Airways
Sat 28/1103:55
MAA
-
ORD
1 stop39h 30m
Etihad Airways
Deal found 30/6₹ 102,264
Thu 20/820:25
ORD
-
MAA
1 stop19h 55m
Multiple Airlines
Sat 19/908:15
MAA
-
ORD
2 stops42h 25m
Multiple Airlines
Deal found 30/6₹ 102,453
Sun 20/906:00
ORD
-
MAA
2 stops34h 20m
Qatar Airways
Wed 30/904:20
MAA
-
ORD
1 stop21h 15m
Qatar Airways
Deal found 30/6₹ 102,642
Wed 26/820:25
ORD
-
MAA
1 stop19h 55m
Multiple Airlines
Wed 30/908:15
MAA
-
ORD
3 stops34h 50m
Multiple Airlines
Deal found 29/6₹ 102,926
Sun 30/819:20
ORD
-
MAA
1 stop20h 50m
Qatar Airways
Tue 29/904:05
MAA
-
ORD
2 stops30h 24m
Qatar Airways
Deal found 30/6₹ 103,210

Find flight deals from Illinois to Chennai

Keep the following information in mind while searching for Illinois to Chennai flight deals. Data was last updated 1 July 2026.

Round-trip from

₹ 96,682

One-way from

₹ 41,719

Popular in

December

Cheapest in

February

Average price

₹ 109,642
Etihad Airways
  • Etihad Airways
  • 16/9-27/9
  • 4 total stops
  • 62h 03m total
  • Illinois to Chennai
Search Deals
Etihad Airways
  • Etihad Airways
  • 9/9
  • 1 total stop
  • 19h 10m total
  • Illinois to Chennai
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (₹ 477,978 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (₹ 383,553 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Illinois to Chennai 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 454,620 searches. Data last updated 1 July 2026.
Use the filters below to find and compare flights from Illinois to Chennai that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

St. LouisChennai

STL - MAA

STLMAA

Lambert-St Louis

Sat 17/10

15:03-02:50

2 stops25h 17m

Chennai

Sat 14/11

10:00-14:32

2 stops40h 02m

₹ 96,682

ChicagoChennai

ORD - MAA

ORDMAA

Chicago O'Hare Intl

Sat 17/10

06:00-02:50

2 stops34h 20m

Chennai

Fri 13/11

03:25-14:30

1 stop22h 35m

₹ 110,210

St. LouisChennai

STL - MAA

STLMAA

Lambert-St Louis

Sun 18/10

06:20-02:50

2 stops34h 00m

Chennai

Sun 15/11

04:05-23:56

2 stops31h 21m

₹ 115,319

St. LouisChennai

STL - MAA

STLMAA

Lambert-St Louis

Thu 17/9

14:13-02:50

2 stops26h 07m

Chennai

Mon 21/9

04:05-23:43

2 stops30h 08m

₹ 115,319

St. LouisChennai

STL - MAA

STLMAA

Lambert-St Louis

Mon 19/10

05:33-02:50

2 stops34h 47m

Chennai

Mon 16/11

04:05-19:27

2 stops26h 52m

₹ 115,319

St. LouisChennai

STL - MAA

STLMAA

Lambert-St Louis

Thu 15/10

06:20-02:50

2 stops34h 00m

Chennai

Wed 11/11

04:05-19:30

2 stops26h 55m

₹ 115,319

St. LouisChennai

STL - MAA

STLMAA

Lambert-St Louis

Thu 15/10

13:00-02:50

2 stops27h 20m

Chennai

Thu 12/11

04:05-20:55

2 stops28h 20m

₹ 115,319

St. LouisChennai

STL - MAA

STLMAA

Lambert-St Louis

Wed 14/10

13:00-02:40

2 stops27h 10m

Chennai

Fri 13/11

04:05-19:27

2 stops26h 52m

₹ 119,103

ChicagoChennai

ORD - MAA

ORDMAA

Chicago O'Hare Intl

Sun 15/11

16:06-02:30

2 stops22h 54m

Chennai

Sun 20/12

03:25-12:33

2 stops44h 38m

₹ 122,414

ChicagoChennai

ORD - MAA

ORDMAA

Chicago O'Hare Intl

Sat 14/11

18:52-02:30

2 stops44h 08m

Chennai

Wed 16/12

03:25-14:30

1 stop22h 35m

₹ 124,116

Flights are sorted by cheapest return flights first.

Deals found on 30/6

Showing 1-10 of 58 resultsSorted by cheapest first
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Best time to book a flight from Illinois to Chennai

Have a flexible travel schedule? Discover the best time to fly to Chennai from Illinois with our price prediction graph.
Estimated return 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 Chennai

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

Currently, April is the cheapest month in which you can book a flight from Illinois to Chennai (average of ₹ 55,058). Flying from Illinois to Chennai in May is currently the most expensive (average of ₹ 187,783). 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.

How much does it cost for a return flight from Illinois to Chennai?

How far ahead should I book a flight from Illinois to Chennai?

Booking 48 days in advance of your planned departure date is, on average, the best time to get cheap flights from Illinois to Chennai. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

Related info for your journey

Find useful and relevant information for your journey from Illinois to Chennai. 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 into for flights to Chennai from Illinois?

    Located just 16.5 km from the city centre, Chennai (MAA) is the airport most travelers will use when flying to Chennai from Illinois.

  • How long is the flight from Illinois to Chennai?

    Airlines like Qatar Airways, British Airways, and Turkish Airlines fly from Illinois to Chennai in about 29h 07m. The time it takes to get you to your destination can typically vary by up to 5h 13m. Illinois and Chennai are separated by a distance of 13773 km. This flight may include one or multiple stops.

  • What are the most popular routes from Illinois to Chennai?

    The most popular flight routes from Illinois to Chennai are Chicago O'Hare Intl - Chennai, Lambert-St Louis - Chennai and Chicago Midway - Chennai.

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

    Yes. In addition to deals on Illinois to Chennai flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Illinois to Chennai?

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

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

    Yes. Cheapflights offers flight deals from Illinois to Chennai 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 Chennai?

    Currently, April is the cheapest month in which you can book a flight from Illinois to Chennai (average of ₹ 55,058). Flying from Illinois to Chennai in May is currently the most expensive (average of ₹ 187,783). 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

Travelling to a place near Chennai?

Book flights to Chennai if you plan to visit one of these locations
Vellore
Mahabalipuram

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Alternative routes for Illinois to Chennai

See prices for flight routes from nearby airports that may be better suited for you.
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Top 3 airlines flying from Illinois to Chennai

Discover the top 3 airlines that operate flights from Illinois to Chennai. 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 454,620 searches. Data last updated 1 July 2026.
AirlineCheapestAverageFlexibilityOn-time
Etihad AirwaysCheapest₹ 77,249Average₹ 105,178FlexibilityNo cancel feeOn-time75%
Search Etihad Airways flights
British AirwaysCheapest₹ 83,780Average₹ 147,385FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Air IndiaCheapest₹ 109,123Average₹ 138,217FlexibilityNo cancel feeOn-timeN/A
Search Air India flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Illinois to Chennai?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Illinois to Chennai. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Illinois to Chennai?

Cheapflights helps you find that perfect flight to Chennai from Illinois by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Illinois to Chennai with no change fees?

Need flexible booking options for your flight to Chennai from Illinois? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Illinois to Chennai become cheaper?

Of course! You can now track prices for flights from Illinois to Chennai and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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