What is the average price for a flight to Illinois with Delta?

The typical Delta fare to Illinois is about $430 for a return ticket.

Does Delta usually have the lowest fares for flights to Illinois?

Allegiant Air frequently offers the lowest average return price for flights to Illinois, but fares can vary between airlines and dates. We recommend comparing all available options on KAYAK before booking your flight.

What other airlines fly to Illinois besides Delta?

In addition to Delta, airlines such as United Airlines, Southwest and Frontier also operate flights to Illinois. Check KAYAK to compare fares from these and other carriers.

Delta flights to Illinois (USIL) from $59

Flight Deals

Cheap Delta Flight Deals to Illinois

Here are some of the best deals found on KAYAK recently from Delta to Illinois that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Direct

Recent round-trip Delta flight deals from the United States to Illinois

Wed, Dec 10 - Tue, Dec 16

7:52 pm - 9:47 pmBOS-ORD

2h 55mnonstop

10:35 am - 1:59 pmORD-BOS

2h 24mnonstop

$127Delta

Find Deal

Tue, Dec 9 - Thu, Dec 18

7:52 pm - 9:47 pmBOS-ORD

2h 55mnonstop

7:10 am - 10:36 amORD-BOS

2h 26mnonstop

$134Delta

Find Deal

Thu, Dec 11 - Mon, Dec 15

8:01 am - 9:56 amJFK-ORD

2h 55mnonstop

7:00 am - 10:23 amORD-JFK

2h 23mnonstop

$137Delta

Find Deal

Thu, Dec 11 - Mon, Dec 15

2:59 pm - 4:39 pmLGA-ORD

2h 40mnonstop

2:35 pm - 5:48 pmORD-LGA

2h 13mnonstop

$137Delta

Find Deal

Fri, Jan 9 - Tue, Jan 13

7:30 am - 9:41 amBOS-ORD

3h 11mnonstop

5:00 pm - 8:21 pmORD-BOS

2h 21mnonstop

$137Delta

Find Deal

Sun, Jan 18 - Mon, Jan 19

7:35 pm - 9:35 pmJFK-ORD

3h 00mnonstop

6:25 pm - 9:59 pmORD-JFK

2h 34mnonstop

$138Delta

Find Deal

Fri, Jan 16 - Tue, Jan 20

6:05 am - 7:58 amLGA-ORD

2h 53mnonstop

5:20 pm - 8:30 pmORD-LGA

2h 10mnonstop

$138Delta

Find Deal

Thu, Jan 8 - Mon, Jan 12

7:35 pm - 9:35 pmJFK-ORD

3h 00mnonstop

10:29 am - 1:54 pmORD-JFK

2h 25mnonstop

$139Delta

Find Deal

Thu, Feb 5 - Mon, Feb 9

7:30 am - 9:27 amLGA-ORD

2h 57mnonstop

6:00 am - 9:26 amORD-LGA

2h 26mnonstop

$139Delta

Find Deal

Fri, Dec 5 - Mon, Dec 8

7:40 pm - 9:39 pmJFK-ORD

2h 59mnonstop

7:00 am - 10:23 amORD-JFK

2h 23mnonstop

$143Delta

Find Deal

Useful Info

Low season	January
High season	May
Cheapest flight	$59
Average price round-trip	$426
Good deal round-trip	$362
Good deal one-way	$321

Best time to beat the crowds but there is an average 5% increase in price.

Most popular time to fly and prices are also 5% lower on average.

Flight from Boston to Chicago O'Hare Airport

(avg. price over the last 2 weeks)

or less

KAYAK's insights & trends for flights to Illinois

Get data-powered insights and trends for flights to Illinois to help you find the cheapest flights, the best time to fly and much more.

Prices

Based on KAYAK data, the cheapest day to fly to Illinois is Friday where round-trip tickets can be as cheap as $381. On the other hand, the most expensive day to fly is Sunday, where round-trip prices are $602 on average.

What is the cheapest month to fly from the United States to Illinois?

The cheapest month for flights from the United States to Illinois is March, when tickets cost $168 (return) on average. On the other hand, the most expensive months are November and July, when the average cost of round-trip tickets is $408 and $357 respectively.

How far in advance should I book a flight from the United States to Illinois?

To get a below average price on the flight from the United States to Illinois, you should book around 4 weeks before departure, which saves you about 45% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 7 weeks before departure.

Which is the cheapest airport to fly into in Illinois?

Prices will differ depending on the departure airport, but generally, the cheapest airport to fly to in Illinois is Moline Quad-City Airport (MLI), with an average flight price of $498.

Find deals

What is the average price for a flight to Illinois with Delta?
The typical Delta fare to Illinois is about $430 for a return ticket.
Does Delta usually have the lowest fares for flights to Illinois?
Allegiant Air frequently offers the lowest average return price for flights to Illinois, but fares can vary between airlines and dates. We recommend comparing all available options on KAYAK before booking your flight.
What other airlines fly to Illinois besides Delta?
In addition to Delta, airlines such as United Airlines, Southwest and Frontier also operate flights to Illinois. Check KAYAK to compare fares from these and other carriers.

7.9

Good8,008 verified ratings

8.1Boarding

7.9Comfort

7.9Entertainment

8.5Crew

7.3Food

Pros +

we slept on that last flight ! (in 1102 reviews)

Cons -

We had a 2.5 hour delay because there was someone missing in the crew. (in 99 reviews)

Show reviews that mention

8.0 Very good

Anonymous, Nov 2025

Our flight from SFO to MSP was right on time on 11/15/2025. No delays. As we approached MSP at about 8 pm, we circled in the air until 8:40 pm so I don't call that efficient for MSP. I think the captain should announce the delay and why. (as if we all don't know that we are just circling around the area, slowing down, speeding up, slowing down.) Thank you. Marilyn Fischer

6.0 Okay

David, Nov 2025

Service in business class was not impressive. I ordered coffee with dinner and then watched other people get 2 refills before I got my 1 cup of coffee, and only after I pressed the attendant button overhead. Furthermore, the seats in the forward cabin need maintenance on this 737-800: the upholstery is detaching from the seat frame, at least on the backs of seats 1C, 1D.

10.0 Wonderful

ricardo, Nov 2025

Great.

8.0 Very good

Kimberly, Nov 2025

Couldn’t hook up to wifi

8.0 Very good

Timothy, Nov 2025

Seats were super uncomfortable

10.0 Wonderful

Jane, Nov 2025

We were not able to access the wifi

10.0 Wonderful

Tristan, Nov 2025

Delta mine is amazing! So comfortable.

8.0 Very good

Charles, Nov 2025

The 21 year old CRJ700 was a bit too old

10.0 Wonderful

Jacky, Nov 2025

Plenty of leg room, temperature was great and staff was excellent. Would do it more often.

10.0 Wonderful

Duane, Nov 2025

The ticket agents in West Palm Beach on Friday afternoon Nov. 7th were incredible in getting us on an earlier plane to Atlanta during the government shutdown. Had the taken our original flight we would have missed our connection. She did this on her own, We didn't even have to ask, and she did it all with a smile and showing genuine concern that we would be taken care of. We are very grateful and thankful. We fly often, and now we will be sure to fly Delta.

Everything you need to know for your flight to Illinois

Airlines

Cabin class

Complete your trip

Delta flights

Flights to other cities

Origins

Popular routes

Return flight deals

Airlines flying to Illinois

United Airlines flights to Illinois

Frontier flights to Illinois

Spirit Airlines flights to Illinois

American Airlines flights to Illinois

Find cheap Delta flights to Illinois from $59

Search hundreds of travel sites at once for deals on Delta flights to Illinois

Cheap Delta Flight Deals to Illinois

Recent round-trip Delta flight deals from the United States to Illinois

Recent one-way Delta flight deals from the United States to Illinois

Recent last minute Delta flight deals from the United States to Illinois

Recent direct Delta flight deals from the United States to Illinois

Good to know

KAYAK's insights & trends for flights to Illinois

Get data-powered insights and trends for flights to Illinois to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest day to fly to Illinois?

Based on KAYAK data, the cheapest day to fly to Illinois is Friday where round-trip tickets can be as cheap as $381. On the other hand, the most expensive day to fly is Sunday, where round-trip prices are $602 on average.

What is the cheapest month to fly from the United States to Illinois?

The cheapest month for flights from the United States to Illinois is March, when tickets cost $168 (return) on average. On the other hand, the most expensive months are November and July, when the average cost of round-trip tickets is $408 and $357 respectively.

How far in advance should I book a flight from the United States to Illinois?

To get a below average price on the flight from the United States to Illinois, you should book around 4 weeks before departure, which saves you about 45% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 7 weeks before departure.

Which is the cheapest airport to fly into in Illinois?

Prices will differ depending on the departure airport, but generally, the cheapest airport to fly to in Illinois is Moline Quad-City Airport (MLI), with an average flight price of $498.

How many airports are there in Illinois?

There are 4 airports in Illinois. The busiest airport is Chicago O'Hare Airport (ORD), with 77% of all flights arriving there.

How long is the flight to Illinois?

An average nonstop flight from the United States to Illinois takes 2h 46m, covering a distance of 965 miles. The shortest route is Minneapolis (MSP) to Chicago O'Hare Intl Airport (ORD) with an average flight time of 1h 24m.

How many direct flights to Illinois are there each day?

There are around 63 direct flights from within United States to Illinois every day. Most flights (40%) depart in the morning.

How many direct flights to Illinois are there each week?

Each week there are around 435 direct flights from within United States to Illinois. The most common day for departures is Sunday, with 17% of flights taking off on this day.

How many long-haul flights are there to Illinois each week?

Each week, there are 20 medium-haul flights (3-6 hour flight duration) and 415 short-haul flights (up to 3 hour flight duration) to Illinois. There aren't any long-haul flights (6-12 hour flight duration).

How many cities have direct flights to Illinois?

From the United States, there are direct flights to Illinois from 7 cities. The city with the most direct flights is Atlanta, with 127 direct flights each week.

What are the most popular destinations in Illinois?

Based on KAYAK flight searches, the most popular destination is Chicago (93% of total searches to Illinois). The next most popular destination is St. Louis (7%).

FAQs for flying to Illinois with Delta

What is the average price for a flight to Illinois with Delta?

Does Delta usually have the lowest fares for flights to Illinois?

What other airlines fly to Illinois besides Delta?

Delta customer reviews

Pros +

Cons -

Traveler rating:

Sort by:

Everything you need to know for your flight to Illinois

Airlines flying to Illinois

Cabin class types available on flights to Illinois

Complete your trip to Illinois with a hotel stay or car rental

Top Delta flights

Flights to other popular destinations

Flights from domestic origins to Illinois

Flights to popular cities in Illinois

Find deals for your return flight