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Find cheap flights from Illinois to the United States
Round-trip
Economy
Search hundreds of travel sites at once for deals on flights to the United States
FAQs for booking Illinois to United States flights
How does KAYAK’s flight Price Forecast tool help me choose the right time to buy?
Top airline flying from Illinois to the United States
Scores according to KAYAK customer reviews
7.2
Allegiant Air
Overall score based on 1,918 reviews
7.7
Boarding
7.0
Comfort
8.2
Crew
6.2
Entertainment
6.4
Food
Book cheap flights from Illinois to United States (round-trip)
Allegiant Air
Mon, Aug 24
RFD
Chicago Greater Rockford
AZA
Phoenix-Mesa Gateway
3h 18m
Mon, Aug 31
AZA
Phoenix-Mesa Gateway
RFD
Chicago Greater Rockford
3h 05m
Trip: 8 days
Based on null reviews
Multiple Airlines
Fri, Aug 7
ORD
Chicago O'Hare Airport
SFB
Orlando Sanford Intl
9h 32m
Fri, Aug 14
SFB
Orlando Sanford Intl
ORD
Chicago O'Hare Airport
27h 25m
Trip: 8 days
Based on null reviews
Allegiant Air
Fri, Jul 31
RFD
Chicago Greater Rockford
AZA
Phoenix-Mesa Gateway
3h 28m
Thu, Aug 6
AZA
Phoenix-Mesa Gateway
RFD
Chicago Greater Rockford
3h 32m
Trip: 7 days
Based on null reviews
Multiple Airlines
Fri, Jul 17
ORD
Chicago O'Hare Airport
SFB
Orlando Sanford Intl
15h 28m
Mon, Jul 20
SFB
Orlando Sanford Intl
ORD
Chicago O'Hare Airport
22h 22m
Trip: 4 days
Based on null reviews
Allegiant Air
Wed, Jul 15
RFD
Chicago Greater Rockford
AZA
Phoenix-Mesa Gateway
3h 15m
Sun, Aug 2
AZA
Phoenix-Mesa Gateway
RFD
Chicago Greater Rockford
3h 32m
Trip: 19 days
Based on null reviews
Multiple Airlines
Fri, Jul 17
ORD
Chicago O'Hare Airport
SFB
Orlando Sanford Intl
15h 28m
Mon, Jul 20
SFB
Orlando Sanford Intl
ORD
Chicago O'Hare Airport
22h 22m
Trip: 4 days
Based on null reviews
Allegiant Air
Mon, Aug 3
RFD
Chicago Greater Rockford
AZA
Phoenix-Mesa Gateway
3h 28m
Wed, Aug 12
AZA
Phoenix-Mesa Gateway
RFD
Chicago Greater Rockford
3h 05m
Trip: 10 days
Based on null reviews
Multiple Airlines
Fri, Jul 17
ORD
Chicago O'Hare Airport
SFB
Orlando Sanford Intl
15h 28m
Fri, Jul 24
SFB
Orlando Sanford Intl
ORD
Chicago O'Hare Airport
22h 22m
Trip: 8 days
Based on null reviews
Allegiant Air
Sun, Aug 23
RFD
Chicago Greater Rockford
AZA
Phoenix-Mesa Gateway
12h 48m
Mon, Aug 31
AZA
Phoenix-Mesa Gateway
RFD
Chicago Greater Rockford
3h 05m
Trip: 9 days
Based on null reviews
Multiple Airlines
Fri, Jul 17
ORD
Chicago O'Hare Airport
SFB
Orlando Sanford Intl
15h 28m
Fri, Jul 24
SFB
Orlando Sanford Intl
ORD
Chicago O'Hare Airport
22h 22m
Trip: 8 days
Based on null reviews
Multiple Airlines
Fri, Jul 17
ORD
Chicago O'Hare Airport
SFB
Orlando Sanford Intl
15h 28m
Mon, Jul 20
SFB
Orlando Sanford Intl
ORD
Chicago O'Hare Airport
22h 22m
Trip: 4 days
Based on null reviews
Allegiant Air
Wed, Jul 15
RFD
Chicago Greater Rockford
AZA
Phoenix-Mesa Gateway
3h 15m
Thu, Aug 6
AZA
Phoenix-Mesa Gateway
RFD
Chicago Greater Rockford
3h 32m
Trip: 23 days
Based on null reviews
Multiple Airlines
Fri, Jul 31
ORD
Chicago O'Hare Airport
SFB
Orlando Sanford Intl
15h 28m
Sun, Aug 2
SFB
Orlando Sanford Intl
ORD
Chicago O'Hare Airport
54h 16m
Trip: 3 days
Based on null reviews
Allegiant Air
Fri, Jul 24
RFD
Chicago Greater Rockford
AZA
Phoenix-Mesa Gateway
3h 28m
Sun, Jul 26
AZA
Phoenix-Mesa Gateway
RFD
Chicago Greater Rockford
3h 32m
Trip: 3 days
Based on null reviews
Multiple Airlines
Fri, Jul 17
ORD
Chicago O'Hare Airport
AZA
Phoenix-Mesa Gateway
12h 50m
Sun, Jul 19
AZA
Phoenix-Mesa Gateway
ORD
Chicago O'Hare Airport
22h 11m
Trip: 3 days
Based on null reviews
Allegiant Air
Thu, Aug 27
MDW
Chicago Midway Airport
SFB
Orlando Sanford Intl
4h 24m
Sun, Sep 6
SFB
Orlando Sanford Intl
MDW
Chicago Midway Airport
5h 29m
Trip: 11 days
Based on null reviews
Multiple Airlines
Sat, Aug 8
ORD
Chicago O'Hare Airport
AZA
Phoenix-Mesa Gateway
25h 08m
Sat, Aug 15
AZA
Phoenix-Mesa Gateway
ORD
Chicago O'Hare Airport
14h 32m
Trip: 8 days
Based on null reviews
Allegiant Air
Mon, Aug 31
RFD
Chicago Greater Rockford
AZA
Phoenix-Mesa Gateway
3h 18m
Mon, Sep 7
AZA
Phoenix-Mesa Gateway
RFD
Chicago Greater Rockford
3h 05m
Trip: 8 days
Based on null reviews
Multiple Airlines
Mon, Aug 3
ORD
Chicago O'Hare Airport
SFB
Orlando Sanford Intl
15h 28m
Thu, Aug 6
SFB
Orlando Sanford Intl
ORD
Chicago O'Hare Airport
30h 29m
Trip: 4 days
Based on null reviews
Book cheap flights from Illinois to United States (one-way)
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Flights to the United States
Return flight deals:
Browse origins:
$134
$85
$163
$31
$142
$254
$82
$89
$150
$159
Browse destinations:
$143
$218
$78
$151
$48
$31
$98
$133
$31
$32
$338
$188
$97
$70
$151
$97
$32
$173
$32
$32
$89
$76
$180
$91
$146
$91
$48
$151
$57
$142
$47
$55
$197
$78
$142
$88
$51
$143
$57
$185
$60
$31
$113
$210
$80
$90
$135
$97
$271
*
Prices are per person and are for e–tickets and include all taxes & fees in USD.
We attempt to get accurate prices, however, prices are not guaranteed.
We attempt to get accurate prices, however, prices are not guaranteed.
Here's why:
We’re not the seller.
At KAYAK we don’t set the prices, so it’s not possible for us to guarantee what other companies are selling.
We compile tonnes of data for you
Our service lets you quickly and easily compare results from hundreds of travel sites at once. In this sense, KAYAK is a search engine and we can't guarantee prices we find.
Why aren’t prices accurate 100% of the time?
Prices on airline seats, hotel rooms and car rentals can change frequently. Several people may also be trying to buy the same travel option simultaneously. As a result, you may find, on occasion, that certain prices are no longer available.
If you have more questions or if you have a bad price to report to us,
please send us an
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