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

The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $30. However, be on the lookout for offers from United Airlines and JetBlue, as they are both options that can get you from Mesa to Illinois for a low price.

Weekly flight availability from Mesa to Illinois

The most flights from MS9 to USIL are scheduled on a Monday (54 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (42 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 Mesa to Illinois?

Most travelers choose Phoenix Sky Harbor Intl - Chicago O'Hare Intl, Phoenix Sky Harbor Intl - Chicago Midway or Phoenix Sky Harbor Intl - Lambert-St Louis when deciding on the best route from Mesa to Illinois.

What are the cheapest flights from Mesa to Illinois?

Looking for the cheapest flight from Mesa to Illinois? While on average our users pay $1,046, our data indicates the cheapest price to be $109. The most popular route (Phoenix Sky Harbor Intl - Chicago O'Hare Intl), is priced around $195.

What are the most reliable airlines from Mesa to Illinois?

Before booking your flight to Illinois from Mesa, check out the most reliable airlines to get you to your destination on time: STARLUX Airlines (92%), Frontier (91%), Volaris( 91%).

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

American Airlines, United Airlines and Frontier are the most popular airlines when flying from Mesa to Illinois.

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

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

How can I find direct flights from Mesa to Illinois?

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

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

Yes. Cheapflights offers flight deals from Mesa 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.

Find Cheap Flights from Mesa to Illinois

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Find flight deals from Mesa to Illinois

Popular in	June
Cheapest in	February
Average price	$338

Highest demand for flights based on searches. 10% potential increase in price ($34 potential increase over avg. RT price).

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Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).

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Average for round-trip flights in November 2026

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Cheapflights Insights

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

Prices

Airlines

What is the cheapest time of day to fly from MS9 to IL?

It’s typically best to fly out from Mesa to Illinois in the afternoon. Doing so could potentially save you 26% on the flight price compared to flying in the evening, which is usually more expensive.

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

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

Reviews of airlines servicing Illinois

See what other customers who have flown with Southwest,United Airlines, andJetBlue from Mesa to Illinois have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Southwest

8.0

Very good

4,214 reviews

Reviews

1 / 20

8.0

Excellent

Libby,Jun 2026

TUS - LAS

One delay in a 2 layover flight=a good trip. The crew was great.

Southwest

8.0

Very good

4,214 reviews

Southwest

8.0

Very good

4,214 reviews

Reviews

1 / 20

8.0

Excellent

Libby,Jun 2026

TUS - LAS

One delay in a 2 layover flight=a good trip. The crew was great.

United Airlines

7.3

Good

10,459 reviews

Southwest

8.0

Very good

4,214 reviews

Reviews

1 / 20

8.0

Excellent

Libby,Jun 2026

TUS - LAS

One delay in a 2 layover flight=a good trip. The crew was great.

JetBlue

7.1

Good

3,063 reviews

Southwest

8.0

Very good

4,214 reviews

Reviews

1 / 20

8.0

Excellent

Libby,Jun 2026

TUS - LAS

One delay in a 2 layover flight=a good trip. The crew was great.

American Airlines

7.0

Good

12,228 reviews

Southwest

8.0

Very good

4,214 reviews

Reviews

1 / 20

8.0

Excellent

Libby,Jun 2026

TUS - LAS

One delay in a 2 layover flight=a good trip. The crew was great.

Frontier

5.5

Fair

2,511 reviews

Southwest

8.0

Very good

4,214 reviews

Reviews

1 / 20

8.0

Excellent

Libby,Jun 2026

TUS - LAS

One delay in a 2 layover flight=a good trip. The crew was great.

Related info for your journey

What are the cheapest airlines to fly from Mesa to Illinois one-way?
The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $30. However, be on the lookout for offers from United Airlines and JetBlue, as they are both options that can get you from Mesa to Illinois for a low price.
What are the most popular routes from Mesa to Illinois?
Most travelers choose Phoenix Sky Harbor Intl - Chicago O'Hare Intl, Phoenix Sky Harbor Intl - Chicago Midway or Phoenix Sky Harbor Intl - Lambert-St Louis when deciding on the best route from Mesa to Illinois.
What are the most reliable airlines from Mesa to Illinois?
Before booking your flight to Illinois from Mesa, check out the most reliable airlines to get you to your destination on time: STARLUX Airlines (92%), Frontier (91%), Volaris( 91%).
What are the cheapest flights from Mesa to Illinois?
Looking for the cheapest flight from Mesa to Illinois? While on average our users pay $1,046, our data indicates the cheapest price to be $109. The most popular route (Phoenix Sky Harbor Intl - Chicago O'Hare Intl), is priced around $195.
Can I find deals for flights from Mesa to Illinois that include hotel bookings?
Yes. In addition to deals on Mesa to Illinois flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Mesa to Illinois?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Mesa to Illinois.
Can I find deals for business class flights from Mesa to Illinois?
Yes. Cheapflights offers flight deals from Mesa 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.

See more FAQs

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Top 6 airlines flying from Mesa to Illinois

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$57	Average$215	FlexibilityNo cancel fee	On-time62%
Allegiant Air	Cheapest$124	Average$215	FlexibilityNo cancel fee	On-time88%
JetBlue	Cheapest$173	Average$288	FlexibilityNo cancel fee	On-time62%
Southwest	Cheapest$187	Average$360	FlexibilityNo cancel fee	On-time63%
United Airlines	Cheapest$193	Average$401	FlexibilityNo cancel fee	On-time69%
American Airlines	Cheapest$215	Average$443	FlexibilityNo cancel fee	On-time71%

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Cheap flights from Mesa, AZ to Illinois

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1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Find flight deals from Mesa to Illinois

Popular in

Cheapest in

Average price

Cheapflights Insights

What is the cheapest time of day to fly from MS9 to IL?

It’s typically best to fly out from Mesa to Illinois in the afternoon. Doing so could potentially save you 26% on the flight price compared to flying in the evening, which is usually more expensive.

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

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

Weekly flight availability from Mesa to Illinois

The most flights from MS9 to USIL are scheduled on a Monday (54 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (42 on average).

Reviews of airlines servicing Illinois

See what other customers who have flown with Southwest,United Airlines, andJetBlue from Mesa to Illinois have to say. Users can see the overall rating for each airline as well as how each is rated 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 Mesa to Illinois one-way?

What are the most popular routes from Mesa to Illinois?

What are the most reliable airlines from Mesa to Illinois?

What are the cheapest flights from Mesa to Illinois?

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

How can I find direct flights from Mesa to Illinois?

Can I find deals for business class flights from Mesa 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 Mesa 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 Mesa to Illinois by cabin class

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

Mesa and Illinois flights

Browse other Mesa and Illinois flight options. Last updated on November 5, 2026.

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Find a return flight route from Illinois

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Mesa to Illinois flights

Consider these flights traveling from Mesa to Illinois.

Top 6 airlines flying from Mesa to Illinois

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