$51 Find Cheap Flights to Illinois

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from the United States to Illinois departing on 2/11. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Illinois

 
These are the airlines KAYAK users have selected most often from within our search results for flights to Illinois
These are the airlines KAYAK users have selected most often from within our search results for flights to Illinois
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 23% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Flight Deals
Booking Insights
Flight Deals

Cheap Flights to Illinois

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Chicago
Chicago1 stop$77
Moline
Molinenonstop$179
Peoria
Peoria1 stop$219
Bloomington
Bloomington1 stop$339
Champaign
Champaign1 stop$268
Springfield
Springfield1 stop$345
St. Louis
St. Louisnonstop$79
Paducah
Paducahnonstop$194
Chicago
Chicago1 stop$77
Moline
Molinenonstop$179
Peoria
Peoria1 stop$219
Bloomington
Bloomington1 stop$339
Champaign
Champaign1 stop$268
Springfield
Springfield1 stop$345
St. Louis
St. Louisnonstop$79
Paducah
Paducahnonstop$194

Book Cheap Illinois Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights 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.

Recent round-trip flight deals to Illinois

Wed, Feb 18 - Tue, Feb 24
Multiple Airlines Logo
5:47 pm - 11:47 pm
ATL
-
ORD
7h 00m
1 stop
Multiple Airlines Logo
11:51 am - 3:01 pm
ORD
-
ATL
2h 10mnonstop
$77Multiple Airlines
Thu, Feb 26 - Thu, Mar 5
Frontier Logo
9:15 pm - 10:39 pm
ATL
-
ORD
2h 24mnonstop
Frontier Logo
5:05 am - 8:22 am
ORD
-
ATL
2h 17mnonstop
$78Frontier
Sat, Mar 14 - Mon, Mar 16
Frontier Logo
9:47 am - 11:16 am
ATL
-
ORD
2h 29mnonstop
Frontier Logo
5:01 am - 8:18 am
ORD
-
ATL
2h 17mnonstop
$79Frontier
Wed, Feb 11 - Mon, Feb 16
Frontier Logo
9:45 am - 11:14 am
ATL
-
ORD
2h 29mnonstop
Frontier Logo
5:05 am - 8:22 am
ORD
-
ATL
2h 17mnonstop
$80Frontier
Tue, Mar 10 - Thu, Mar 12
Spirit Airlines Logo
11:05 pm - 12:40 am
EWR
-
ORD
2h 35mnonstop
Spirit Airlines Logo
6:16 pm - 9:24 pm
ORD
-
EWR
2h 08mnonstop
$89Spirit Airlines
Sun, Mar 8 - Sat, Mar 14
Spirit Airlines Logo
11:05 pm - 12:40 am
EWR
-
ORD
2h 35mnonstop
Spirit Airlines Logo
6:16 pm - 9:24 pm
ORD
-
EWR
2h 08mnonstop
$90Spirit Airlines
Wed, Feb 25 - Wed, Mar 4
United Airlines Logo
1:00 pm - 2:22 pm
DCA
-
ORD
2h 22mnonstop
United Airlines Logo
7:00 am - 9:54 am
ORD
-
DCA
1h 54mnonstop
$197United Airlines
Tue, Feb 24 - Tue, Mar 3
American Airlines Logo
7:59 pm - 9:24 pm
DCA
-
ORD
2h 25mnonstop
American Airlines Logo
7:48 pm - 11:00 pm
ORD
-
DCA
2h 12mnonstop
$198American Airlines
Tue, Feb 24 - Tue, Mar 3
JetBlue Logo
6:00 am - 11:59 am
DCA
-
ORD
6h 59m
1 stop
JetBlue Logo
10:00 am - 6:55 pm
ORD
-
DCA
7h 55m
1 stop
$207JetBlue
Fri, Feb 20 - Tue, Feb 24
United Airlines Logo
11:59 pm - 6:19 am
SFO
-
ORD
4h 20mnonstop
United Airlines Logo
6:17 pm - 9:20 pm
ORD
-
SFO
5h 03mnonstop
$250United Airlines
Booking Insights

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 flight to Illinois?

These are the best round-trip prices found by users searching on KAYAK in the last 72 hours.

The cheapest ticket to Illinois from the United States found in the last 72 hours was to Chicago Midway Airport, at $58 round-trip. The most popular route is Atlanta (ATL) to Chicago Midway Airport (MDW) and the cheapest round-trip airline ticket found on this route in the last 72 hours was $58.

How much is a flight to Illinois?

The average and cheapest price for all round-trip flights to Illinois from each origin found by users searching on KAYAK in the last month.

A flight to Illinois costs $355 on average. The cheapest price found on KAYAK in the last 2 weeks was $29 for the route Dallas/Fort Worth Airport (DFW) to Champaign (CMI). The most popular routes on KAYAK are New York to Chicago which costs $318 on average, and Boston to Chicago, which costs $353 on average.

See prices from:

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from the United States to Illinois, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from the United States to Illinois is April, when tickets cost $283 (return) on average. On the other hand, the most expensive months are September and July, when the average cost of round-trip tickets is $494 and $485 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights to Illinois, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from the United States to Illinois, you should book around 3 weeks before departure, which saves you about 42% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 18 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 Chicago Greater Rockford Airport (RFD), with an average flight price of $139.

Good to know

Low seasonJanuary
Cheapest flight$51
Best time to beat the crowds with an average 1% drop in price.
Most popular time to fly and prices are also 1% lower on average.
Flight from Atlanta to Chicago O'Hare Airport

Flights to Illinois: the best tips from KAYAK users' own experiences

Insights shared by verified travelers who flew to Illinois 
BillFlew with Frontier
MCO
-
ORD
Dec 2025
Wear comfortable clothing and make sure you layer. We went from 80o to 30o,
Thrinadh KumarFlew with United Airlines
OGG
-
ORD
Dec 2025
Flight is conjusted. Difficult to sleep. Carry pillows and sleep well beforeyou travel
StephenFlew with United Airlines
SMF
-
ORD
Jan 2026
If you're trying to make a connecting flight make sure you allow PLENTY of time between flights or be prepared to miss the next flight. Make sure to use the restroom at the last possible moment before landing because you could be sitting on the taxiway for 5 more minutes... 5 more minutes... 5 more minutes... until it's been nearly 2 hours. Don't trust the airline provided ETA provided by apps they don't update it until long after you're delayed. If someone is showing up to give you a ride, make sure they have hours to wait for you.
JeremyFlew with United Airlines
XNA
-
ORD
Nov 2025
Beware short connection times on flights connecting in Chicago.
DouglasFlew with American Airlines
HSV
-
ORD
Jun 2025
Check your app for delay notices. This notice did come out early in the morning - I failed to check it. Checking it could have saved 4 hours at the airport
Verified travelerFlew with British Airways
DSM
-
ORD
Jun 2025
Make sure your luggage receipts have the ID numbers on them
StaceyFlew with American Airlines
PHX
-
ORD
Feb 2025
Don’t be that person who holds up the plane because of your carry on. Whether putting in over bin (able to lift it on your own) or refusing to not listen when space is full and need to check it.
StephenFlew with United Airlines
EWR
-
ORD
Jan 2025
Don't bring a carry on roller bag. It won't fit. They will gate check it. It will take forever.
RodFlew with United Airlines
SAN
-
ORD
Sep 2024
Yes! Don’t reserve a flight with less than 1 1/2 hour connection time or you have a good possibility of missing your connection.
FrancisFlew with United Airlines
LAX
-
ORD
Sep 2024
Check the weather, or bring a. Raincoat! Being from sunny California, I forget it isn’t always sunshine in other states!
GeraldFlew with Alaska Airlines
SFO
-
ORD
Oct 2024
Book a flight as early in the day as possible to avoid incoming flight delays.
AdamFlew with Southwest
DEN
-
ORD
Oct 2024
Arriving T5 at ORD on Southwest is often a LONG walk, with no moving walkways going out, to baggage claim / pickup.
DinaFlew with United Airlines
HSV
-
ORD
Nov 2024
Be prepared for delays and plan to check your luggage. Overhead bins are ⅓ the size of a typical bin.
KimFlew with American Airlines
SNA
-
ORD
Nov 2024
Bring extra foods and buy extra drinks bring your meds
LeoFlew with United Airlines
CLT
-
ORD
Jun 2024
Get precheck TSA if you’re flying in early morning. Get a seat on the right side of the plane if you want to see sunrise.
Verified travelerFlew with American Airlines
PHL
-
ORD
Jul 2024
Fly out the night before you have anything to do in Chicago so you don’t get delayed and miss out on plans
CameonFlew with Frontier
SLC
-
ORD
Jul 2024
Fly Delta! Book directly through the airline, not a second booking party.
GailFlew with JetBlue
BOS
-
ORD
Jul 2024
Prepare for a long wait after you actually touch down. Ohare Airport is HUGE and you can taxi for a long time.
MichelleFlew with United Airlines
MBS
-
ORD
Apr 2024
Bring water on board and charge your devices in advance.
Verified travelerFlew with Southwest
LAS
-
ORD
May 2024
Leave plenty of time to get your bag in Chicago if you check one. Took 45 minutes to get my bag this time.
Verified travelerFlew with Alaska Airlines
SDF
-
ORD
Apr 2024
If flight gets delayed. Be sure to ask the airlines you traveled with, to rebook the next available flight immediately.
KariFlew with British Airways
LSE
-
ORD
May 2024
Ask for assistance. Chicago is huge airport 🛫 and can get lost easy.
CindyFlew with Southwest
TPA
-
MDW
Mar 2024
Don’t check a bag. Chicago takes forever to get your baggage.
yvgeniFlew with United Airlines
EWR
-
ORD
Jan 2024
Check the weather before flying , and don’t rely on getting on time to your destination

FAQs - booking Illinois flights

  • What’s the best airport to fly into Chicago?

    The O’Hare International Airport and the Midway International Airport are the two major airports serving Chicago. The first one is 17 mi from the city center and has more flights and amenities. But, if you prefer a less busy airport, consider searching for flights that land at Midway International instead. Being less crowded is not the only advantage of this airport—it’s also closer to downtown Chicago (10 mi). Both airports are served by the famous "L" train. To travel from O’Hare to the city center, take CTA Blue Line, and from Midway, take the CTA Orange Line.

  • Where do I fly into if I’m visiting Springfield?

    Abraham Lincoln Capital Airport (SPI) is the airport serving Springfield, less than 10 mi from the city center. Keep in mind that this airport is served by only three airlines. Those airlines are Allegiant Air, flying from Punta Gorda in Florida; American Eagle, flying from Dallas-Fort Worth; and United Express, flying from Chicago O’Hare.

  • I’m going to Six Flags Great America. Which airport do I fly into?

    If you’re looking for flights to Illinois to visit the Six Flags Great America amusement park, choose Chicago as your final destination. O’Hare International Airport is 32 mi from the park and Midway International is 60 mi from the park. In addition to being the most convenient because of its proximity to the park, O’Hare International is also the airport with the most flight options.

  • Which airport is best if I’m going to Carbondale, Illinois?

    The airport in Illinois with commercial flights that’s closest to Carbondale is Midway International (5h 4m drive from Carbondale). Passengers who prefer a shorter driving distance between the airport and the city can look for flights to airports in neighboring states, e.g., St. Louis Lambert International (STL) in Missouri (2h 10m).

  • How does KAYAK find such low prices on flights from the United States to Illinois?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from the United States to Illinois.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from the United States to Illinois?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from the United States to Illinois is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from the United States to Illinois?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from the United States to Illinois with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from the United States to Illinois?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from the United States to Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • 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 $372. On the other hand, the most expensive day to fly is Sunday, where round-trip prices are $591 on average.

  • What is the cheapest time of day to fly to Illinois?

    The cheapest time of day to fly to Illinois is generally in the evening, when round-trip flights cost $274 on average. Morning departures are around 45% more expensive than evening flights, on average. The most expensive time of day to fly to Illinois is generally in the afternoon, which is peak travel time and where the average cost of a ticket is $450.

Top tips for finding cheap flights to Illinois

  • Looking for cheap airfare to Illinois? 25% of our users found round-trip tickets to Illinois for the following prices or less: From Phoenix-Mesa Gateway $180, from Boston $300, from Atlanta $560
  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest Illinois flight deals.
  • When you’re looking for flights to Illinois and you’re not sure which destination to pick, Chicago is perhaps the first city that comes to mind. The city is served by three airports, which makes it the best-known gateway into the Prairie State. If you like to choose airports based on airlines, keep in mind that the Chicago O’Hare International Airport (ORD) is the hub airport for American Airlines and United Airlines.
  • Midway International Airport (MDW) is the second largest airport in Chicago, and it’s mainly used by Southwest Airlines as a layover airport for dozens of destinations in the United States.
  • If you’re traveling to more than one destination in Illinois, Central Illinois Regional Airport (BMI) is a good option for those staying close to major cities like Rockford (2h 10m), Chicago (2h 45m), and Springfield (1h 10m) but prefer a smaller airport. Frontier Airlines, Allegiant Air, American Eagle, and Delta Connection are the airlines operating regular flights to Illinois from Orlando, Dallas, Atlanta, and Denver.
  • For passengers traveling with children and looking to rent a car at an airport in Illinois, keep in mind that local state laws require children under 2 years old to sit in a rear-facing child seat. From ages 4 to 8, children can sit in a forward-facing seat. Children between 8 and 12 years old can use a booster seat.
  • For passengers traveling with pets, you'll find pet relief areas at both of Chicago's international airports and also at Central Illinois Regional Airport.

Reviews of the top 5 airlines flying to Illinois

 
See real verified KAYAK customer reviews for airlines flying to Illinois. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline from the United States to Illinois. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from the United States to Illinois? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
SouthwestOverall score based on 4267 reviews
7.5Entertainment
8.1Boarding
7.0Food
8.0Comfort
8.6Crew
Airline reviews

All good except once again bags took an hour at Midway Airport Happens all the time. Ridiculous

10.0 ExcellentAnonymous, Jan 2026
PHX - MDW
Read more Southwest reviews

All good except once again bags took an hour at Midway Airport Happens all the time. Ridiculous

Everything went smoothly and we even arrived a little bit early.

Great vacation. Can't wait till next year for another one.

Great flight but super high price. Glad it was a business trip and not personal

On time. Friendly staff. Took to long to pre bord all the specialty groups. Cramped small plane

The seats were comfortable, and the boarding process was pretty smooth.

3 hour delay. Had to change plans and was still delayed.

The staff was very friendly, professional, and courteous. The overall flight was a great experience.

The crew canceled the complementary snack and drink in anticipation of turbulence that never materialized. I was counting on the drink (water) to take the the doses of medication - prescribed for my heart condition - that were due during the flight. Since no snack or meal was served on this flight, I cannot rate the food quality. Otherwise, this flight was excellent.

Departure was delayed more than 1/2 hour while we waited for luggage (only) transfer from another flight/plane. Once approved for takeoff, the flight was excellent.

Seated dude next to me even though lots of empty rows. But main thing was we sat on the tarmac after landing for 30 minutes because of, in the words of the dude who sat next to me, “operational incompetence”. We got changing directions about where to pick up gate checked bags. Pilot and flight attendant were awesome though.

It was a pretty standard flight... until the almost hour and a half spent on the taxi way. I get that the weather has been poor but the delay had nothing to do with the weather and more to do with a plane with several issues tying up the gate. I get that that happens from time to time but this has been EVERY flight I've been on for the past 5 years and I fly 3 to 5 times a year. This isn't just United... it's American, it's Delta. It's an issue with the entire industry. I work for UPS and packages on a cargo plane get better service than people do these days. Anymore I HATE flying.

Perfect flight. Smooth flight. Arrived 20 minutes early at destination. Excellent service.

The flights were on time which was great give. It was holiday travel season and there’d been some weather issues. The only complaint and this is every time with United is the terrible seat design. The head rest is not built for comfort and having my neck bent forward for a cross country trip reminded me while I try not to take United flights as a rule.

Everything was absolutely wonderful from check in to baggage claim. Staff was very professional and sweet. Will definitely recommend United to family and friends.

They did the one thing that really matters - got to Chicago early.

The flight was on time. I generally don’t drink or eat on short flights and the seats were good and the flight attendants were friendly. That’s all I expect

It was nice to have gotten up upgraded to first class with a meal on a three hour flight

Very bad! They kept delaying my flight and wouldn’t do anything about it

Door to door, the crew and staff were amazing. It was a stressful travel day with delays, but they were focused on customers and doing what they could to get us to our destinations.

Pilot navigated severe weather/snow storm with skill. Described his intentions clearly

Little warm on the plane and delayed for an hour

So excited very proud first of all I wanna thank kayak all updates very professional and fast alart And amazing cabin crew so nice to me they deserve big salute

The boarding process needs to be fixed. The zone don't work, especially when there is hardly anyone in zones 3, 4,and 5, leaving the majority of the passengers backed up in the aisle, especially because passengers seated near the front are blocking passengers who are seated in the rear of the plane. It would also help if the size of carry on bags was more strictly enforced.

Awful. They won’t help me with anything. I booked on American but they abdicated to Iberia. The ticket was overpriced. Everything negative

I enjoyed the extra leg room compared to other airlines. The first stewards made my daughter’s birthday special by giving her an extra snack. Then the last one coming home from Chicago to Appleton made our night really enjoyable Thanks for making our trip enjoyable

It was good..clean, comfy seat. Friendly warm welcoming crew. Was able to check my cabin luggage at the gate which I was able to pickup in a decent time from baggage claim. The app gave all updates from delays to baggage claim info. Overall smooth flight.

It was a typical flight. We had a delay which seems to be the normality now. And we had no in flight service due to conditions.

After we landed we sat on the tarmac for 1.5 hours waiting to get to our gate. Ridiculous.

Terrible. Flight delayed for more than 8 hours with only a $12 meal voucher provided for the inconvenience. The airplane did not have breaks on arrival yet they still made us go through the motions and board on time knowing we could not take off then sit for 40+ minutes before having to get of the time. A complete waste of my time. I cannot believe they can stay business with these shenanigans. I’ll avoid this company like the plague moving forward as the lack of accountability is disgraceful.

Not seat assigned because overbooking. We could go because some people decided to give their seats.

The flights were very uncomfortable the seats don't have much leg room at all and they are pretty hard as well.

Our outgoing flight was cancelled two hours before boarding and Spirit was not able to get us onto another flight. Their customer service was slow and unhelpful.

spirit delayed my first flight 9 hours and then cancelled my flight back home. Very disappointed with their service.

Late taking off. ATC sent us circling around Chicago for almost an hour, after landing taxied for 40 minutes.

I waited for 4+ extra hours to even board when i was fighting off a cold. So i was sitting there in the airport with a fever and chills while spirit wasted my time. Then once on the plane we had at least an extra hour of taxiing before and after takeoff. Really poor airline, no amenities to speak of, and a lack of organization that will just ruin your experience.

Terrible. They cancelled the flight at the last minute after I had checked in at the airport and then told me they could only put me on a flight after 7 days. Pathetic.

Flight was on time. Friendly crew. Gate agents in the other hand were very unfriendly.

Bought round trip tickets. Ended up upgrading to first class. Both flights were new planes but hadn’t been equipped with WiFi and there were no charging ports at my seat despite it being new and first class accommodations.

Like: seats that don't move; fast boarding; engaging crew; low-prices; individual gate at LGA; access to restrooms at the gate Dislike: no water on the flight

Very well recently! Frontier is improving and less harrassing customer on luggages! Positive!

Good for a budget airline! It was easy to get on, staff was really nice. Can’t say anything about the food or entertainment because it wasn’t available, which is fine.

I am writing to express my disappointment with my recent Frontier Airlines flight. I was charged $99 at the gate because my bag was said to be too large, yet once onboard there was no available overhead bin space, and I was required to place the bag under the seat in front of me anyway. This made the charge feel unnecessary and unfair. Additionally, before the flight even took off, I was asked to move from the seat I paid for into a middle seat so another passenger and her cat could have my seat to themselves. I was not offered compensation or an explanation for being moved from a paid seat. Between the unexpected bag fee and being forced to give up my seat, this experience fell well below acceptable customer service standards. I would appreciate a review of this situation and appropriate compensation.

It was costly and difficult to check in. $85 to take a small suitcase with me, carry on or checked and $75 on the return trip, Plus $25 if I didn't check my self in check in $25, because I couldn't do it on the kiosk. Small very uncomfortable seats, waited on the runway for near an hour each way. It was my worst flight to date.

It was ok. It was expensive to check 2 bags ($75.00 per bag), and then it took a long time to wait for shuttle to take us from one terminal to the terminal where the plane was taking off at LAX. And all of this for a flight where we had to pay for any food or drink that was not water.

It didn’t happen. I booked it and then was told it wasn’t available and then forced to pay far higher prices for a worse option

A 630departure flight Delayed 6hours! They changed my gate, I moved to the new gate. Had our flight on the screen for 12noon departure. I go get above to eat, check screen again and the flight was gone, no notice no announcement, nothing!! They sent my bag on the flight I wasn’t on, got it back to me 3days later. Thank goodness they did refund my money but I will NEVER fly them again.

Due to weather, my flight was delayed, further delayed, then canceled. I eventually got through to a support person who helped me find a different route out of MSP, but to get to DIA, they didn't want to, but eventually did help with the connection ticket purchase. But even this replacement flight was delayed time and time again, and I would have missed my connecting flights and I didn't want to get stuck in a layover city, so after 12 hours at the airport with two young boys who were very tired, we just cancelled our plans and spent the week at home, instead of Nana's.

Plane and crew on board were fine. Everything else was terrible.

The third party booking with cheapflightsfares was awful. Kayak should NOT partner with them. They sold me a bundle including seat selection and carry-on, but did not book the carry-ons with Frontier, so I’m out of pocket for $414 more while I await resolution.

Everything you need to know for your flight to Illinois