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Cheap flights from Illinois to Chennai from ₹ 40,581

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 19/9. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — MAA
14 Sep — 21 Sep1
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 15 August 2026.

Fri 9/1020:35 -
1 stop19h 25m
Thu 19/1103:50 -
1 stop22h 35m
Deal found 10/8₹ 89,373
Mon 17/819:20 -
1 stop21h 00m
Mon 14/904:05 -
1 stop21h 30m
Deal found 10/8₹ 90,137
Thu 17/916:15 -
1 stop44h 50m
Fri 16/1000:50 -
1 stop23h 35m
Deal found 11/8₹ 90,423
Tue 1/920:35 -
1 stop37h 25m
Mon 14/904:05 -
1 stop22h 10m
Deal found 13/8₹ 90,518
Mon 14/920:00 -
2 stops32h 10m
Sat 17/1008:15 -
2 stops42h 25m
Deal found 12/8₹ 90,614
Sun 27/920:25 -
1 stop32h 10m
Sun 4/1019:10 -
3 stops31h 00m
Deal found 13/8₹ 90,709
Tue 1/920:25 -
1 stop25h 30m
Mon 14/921:25 -
2 stops28h 45m
Deal found 13/8₹ 90,996
Tue 1/920:35 -
1 stop37h 25m
Wed 30/922:05 -
1 stop28h 10m
Deal found 11/8₹ 91,091
Wed 23/920:25 -
1 stop25h 30m
Thu 8/1010:45 -
2 stops32h 20m
Deal found 13/8₹ 91,282
Tue 15/920:35 -
1 stop19h 25m
Wed 7/1022:05 -
1 stop28h 10m
Deal found 11/8₹ 91,378
Sat 19/916:15 -
1 stop44h 50m
Mon 19/1000:50 -
1 stop23h 35m
Deal found 10/8₹ 91,473
Fri 9/1005:00 -
2 stops28h 40m
Sat 21/1103:55 -
2 stops27h 00m
Deal found 12/8₹ 97,584

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 15 August 2026.

Round-trip from

₹ 90,423

One-way from

₹ 40,581

Popular in

December

Cheapest in

February

Average price

₹ 91,187
Cathay Pacific
  • Cathay Pacific
  • 16/9-16/10
  • 2 total stops
  • 68h 25m total
  • Illinois to Chennai
Search Deals
19/9
  • 19/9
  • 2 total stops
  • 39h 00m total
  • Illinois to Chennai
Search Deals
Highest demand for flights based on searches. 5% potential increase in price (₹ 581,119 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (₹ 400,166 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 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 15 August 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
Fastest return journey

ChicagoChennai

ORD Chicago O'Hare Intl - MAA Chennai

ORDMAA

Chicago O'Hare Intl

Wed 30/9

20:35-02:30

1 stop19h 25m

Chennai

Thu 15/10

04:05-15:45

1 stop22h 10m

₹ 93,574

ChicagoChennai

ORD Chicago O'Hare Intl - MAA Chennai

ORDMAA

Chicago O'Hare Intl

Sat 7/11

18:50-14:20

2 stops32h 00m

Chennai

Fri 11/12

07:20-15:05

2 stops43h 15m

₹ 96,438

ChicagoChennai

ORD Chicago O'Hare Intl - MAA Chennai

ORDMAA

Chicago O'Hare Intl

Sat 7/11

18:50-14:20

2 stops32h 00m

Chennai

Sun 6/12

07:20-15:05

2 stops43h 15m

₹ 96,438

St. LouisChennai

STL Lambert-St Louis - MAA Chennai

STLMAA

Lambert-St Louis

Wed 2/9

16:50-08:25

2 stops29h 05m

Chennai

Mon 14/9

04:05-00:27

2 stops30h 52m

₹ 97,584

St. LouisChennai

STL Lambert-St Louis - MAA Chennai

STLMAA

Lambert-St Louis

Fri 25/9

05:00-20:10

2 stops28h 40m

Chennai

Sun 11/10

21:55-20:52

2 stops33h 27m

₹ 97,584

St. LouisChennai

STL Lambert-St Louis - MAA Chennai

STLMAA

Lambert-St Louis

Fri 4/9

06:00-20:10

2 stops27h 40m

Chennai

Thu 17/9

21:55-20:44

2 stops33h 19m

₹ 97,584

St. LouisChennai

STL Lambert-St Louis - MAA Chennai

STLMAA

Lambert-St Louis

Sat 19/9

07:27-20:10

2 stops26h 13m

Chennai

Sat 17/10

04:05-21:13

2 stops27h 38m

₹ 97,584

St. LouisChennai

STL Lambert-St Louis - MAA Chennai

STLMAA

Lambert-St Louis

Fri 11/9

13:49-08:25

2 stops32h 06m

Chennai

Fri 18/9

21:55-00:27

2 stops37h 02m

₹ 97,584

St. LouisChennai

STL Lambert-St Louis - MAA Chennai

STLMAA

Lambert-St Louis

Fri 9/10

05:00-20:10

2 stops28h 40m

Chennai

Wed 25/11

21:50-19:38

2 stops33h 18m

₹ 97,584

St. LouisChennai

STL Lambert-St Louis - MAA Chennai

STLMAA

Lambert-St Louis

Wed 2/9

09:32-02:50

2 stops30h 48m

Chennai

Wed 16/9

10:15-13:16

2 stops37h 31m

₹ 97,584

Flights are sorted by cheapest return flights first.

Deals found on 13/8

Showing 1-10 of 60 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, February is the cheapest month in which you can book a flight from Illinois to Chennai (average of ₹ 80,875). Flying from Illinois to Chennai in December is currently the most expensive (average of ₹ 155,352). 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?

Airfare is typical for this route at the moment.
Illinois to Chennai flights typically cost between ₹ 88,704 and ₹ 112,671 in September.
The cheapest return price found within the last 5 days was ₹ 90,423 on Cathay Pacific (17 Sept–16 Oct).

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

Booking 47 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 Emirates, Cathay Pacific, and Etihad Airways fly from Illinois to Chennai in about 19h 25m. The time it takes to get you to your destination can typically vary by up to 4h 50m. 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, February is the cheapest month in which you can book a flight from Illinois to Chennai (average of ₹ 80,875). Flying from Illinois to Chennai in December is currently the most expensive (average of ₹ 155,352). 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 15 August 2026.
AirlineCheapestAverageFlexibilityOn-time
Etihad AirwaysCheapest₹ 77,970Average₹ 95,042FlexibilityNo cancel feeOn-time75%
Search Etihad Airways flights
British AirwaysCheapest₹ 84,561Average₹ 160,104FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Air IndiaCheapest₹ 110,141Average₹ 139,506FlexibilityNo 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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