What are the cheapest airlines to fly from Clearwater to Illinois one-way?

$44 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on Allegiant Air and Southwest, with prices starting from $56 and $78, respectively.

Weekly flight availability from Clearwater to Illinois

The most flights from CL9 to USIL are scheduled on a Friday (67 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (49 on average).

In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.

If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

What are the most popular routes from Clearwater to Illinois?

When deciding which route to take from Clearwater to Illinois consider Tampa - Chicago O'Hare Intl, Tampa - Chicago Midway or Tampa - Lambert-St Louis as they are the most popular.

What are the cheapest flights from Clearwater to Illinois?

The cheapest flight price from Clearwater to Illinois is $96. On average you can expect to pay $1,312. The most popular route, (Tampa - Chicago O'Hare Intl), can usually be booked for $192.

What are the most reliable airlines from Clearwater to Illinois?

Consider Japan Airlines (86%), ITA Airways (83%) or ANA (78%) when booking your flight. These represent the most reliable airlines when flying from Clearwater to Illinois.

What are the most popular airlines that fly from Clearwater to Illinois?

The most popular airlines flying from Clearwater to Illinois are United Airlines, American Airlines and Frontier. Something to consider prior to booking your flight.

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

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

How can I find direct flights from Clearwater to Illinois?

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

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

Yes. Cheapflights offers flight deals from Clearwater to Illinois by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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Popular in	July
Cheapest in	January
Average price	$306

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Highest demand for flights based on searches. 20% potential increase in price ($70 potential increase over avg. RT price).

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Average for round-trip flights in September 2026

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Everything you need to know about your flight from Clearwater to Illinois

Prices

Airlines

What is the cheapest time of day to fly from CL9 to IL?

A simple way to save on the total cost of your ticket is to fly from Clearwater to Illinois in the evening. If you’re flexible enough to do this you can expect to save up to 10% on your trip compared to booking a flight at noon.

What is the cheapest day to fly from Clearwater to Illinois?

Travelers seeking maximum savings on their Clearwater to Illinois flight should consider departing on Saturday evenings when fares are most often at their lowest. Wednesday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Illinois

Get a feel of what it's like to fly with Southwest,United Airlines, andJetBlue from Clearwater to Illinois by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Southwest

8.0

Very good

4,202 reviews

Reviews

1 / 20

6.0

Good

Reza,Jun 2026

TPA - MDW

The seats were super cramped and couldn’t move without hitting other passengers

Southwest

8.0

Very good

4,202 reviews

Southwest

8.0

Very good

4,202 reviews

Reviews

1 / 20

6.0

Good

Reza,Jun 2026

TPA - MDW

The seats were super cramped and couldn’t move without hitting other passengers

United Airlines

7.4

Good

10,245 reviews

Southwest

8.0

Very good

4,202 reviews

Reviews

1 / 20

6.0

Good

Reza,Jun 2026

TPA - MDW

The seats were super cramped and couldn’t move without hitting other passengers

JetBlue

7.1

Good

3,039 reviews

Southwest

8.0

Very good

4,202 reviews

Reviews

1 / 20

6.0

Good

Reza,Jun 2026

TPA - MDW

The seats were super cramped and couldn’t move without hitting other passengers

American Airlines

7.0

Good

12,097 reviews

Southwest

8.0

Very good

4,202 reviews

Reviews

1 / 20

6.0

Good

Reza,Jun 2026

TPA - MDW

The seats were super cramped and couldn’t move without hitting other passengers

Frontier

5.6

Fair

2,571 reviews

Southwest

8.0

Very good

4,202 reviews

Reviews

1 / 20

6.0

Good

Reza,Jun 2026

TPA - MDW

The seats were super cramped and couldn’t move without hitting other passengers

Related info for your journey

What are the cheapest airlines to fly from Clearwater to Illinois one-way?
$44 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on Allegiant Air and Southwest, with prices starting from $56 and $78, respectively.
What are the most popular routes from Clearwater to Illinois?
When deciding which route to take from Clearwater to Illinois consider Tampa - Chicago O'Hare Intl, Tampa - Chicago Midway or Tampa - Lambert-St Louis as they are the most popular.
What are the most reliable airlines from Clearwater to Illinois?
Consider Japan Airlines (86%), ITA Airways (83%) or ANA (78%) when booking your flight. These represent the most reliable airlines when flying from Clearwater to Illinois.
What are the cheapest flights from Clearwater to Illinois?
The cheapest flight price from Clearwater to Illinois is $96. On average you can expect to pay $1,312. The most popular route, (Tampa - Chicago O'Hare Intl), can usually be booked for $192.
Can I find deals for flights from Clearwater to Illinois that include hotel bookings?
Yes. In addition to deals on Clearwater to Illinois flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Clearwater to Illinois?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Clearwater to Illinois.
Can I find deals for business class flights from Clearwater to Illinois?
Yes. Cheapflights offers flight deals from Clearwater to Illinois by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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Top 8 airlines flying from Clearwater to Illinois

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$57	Average$196	FlexibilityNo cancel fee	On-time62%
Allegiant Air	Cheapest$83	Average$202	FlexibilityNo cancel fee	On-time88%
Delta	Cheapest$98	Average$337	FlexibilityNo cancel fee	On-timeN/A
Breeze Airways	Cheapest$122	Average$198	FlexibilityNo cancel fee	On-timeN/A
JetBlue	Cheapest$146	Average$330	FlexibilityNo cancel fee	On-time62%
American Airlines	Cheapest$156	Average$425	FlexibilityNo cancel fee	On-time71%
Southwest	Cheapest$157	Average$343	FlexibilityNo cancel fee	On-time63%
United Airlines	Cheapest$159	Average$376	FlexibilityNo cancel fee	On-time69%

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Cheap flights from Clearwater, FL to Illinois

Find cheap flights from Clearwater to Illinois with Cheapflights

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Find flight deals from Clearwater to Illinois

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Popular in

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Cheapflights Insights

What is the cheapest time of day to fly from CL9 to IL?

A simple way to save on the total cost of your ticket is to fly from Clearwater to Illinois in the evening. If you’re flexible enough to do this you can expect to save up to 10% on your trip compared to booking a flight at noon.

What is the cheapest day to fly from Clearwater to Illinois?

Travelers seeking maximum savings on their Clearwater to Illinois flight should consider departing on Saturday evenings when fares are most often at their lowest. Wednesday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Clearwater to Illinois

The most flights from CL9 to USIL are scheduled on a Friday (67 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (49 on average).

Reviews of airlines servicing Illinois

Get a feel of what it's like to fly with Southwest,United Airlines, andJetBlue from Clearwater to Illinois by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

What are the cheapest airlines to fly from Clearwater to Illinois one-way?

What are the most popular routes from Clearwater to Illinois?

What are the most reliable airlines from Clearwater to Illinois?

What are the cheapest flights from Clearwater to Illinois?

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

How can I find direct flights from Clearwater to Illinois?

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Clearwater to Illinois

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to Illinois by adding a car rental and/or hotel reservation to your travel itinerary.

Search flights from Clearwater to Illinois by cabin class

Find flights from Clearwater to Illinois, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Clearwater and Illinois flights

Browse other Clearwater and Illinois flight options. Last updated on September 28, 2026.

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Find a return flight route from Illinois

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Clearwater to Illinois flights

Consider these flights traveling from Clearwater to Illinois.

Top 8 airlines flying from Clearwater to Illinois

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