Cheap flights from Houston to Illinois
HOU — ORD
Nov 17 — Nov 241
Round-trip
1 adult, Economy
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Keep the following information in mind while searching for Houston to Illinois flight deals. Data was last updated October 18, 2026.
Popular in | October |
|---|---|
Cheapest in | January |
Average price | $308 |
Cheapflights Insights
Everything you need to know about your flight from Houston to Illinois
How far ahead should I book a flight from Houston to Illinois?
The price you pay for your flight from Houston to Illinois may vary depending on when you book. For the best chance of a lower fare, look to book 78 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest month to book a flight from Houston to Illinois?
Currently, January is the cheapest month in which you can book a flight from Houston to Illinois (average of $219). Flying from Houston to Illinois in June is currently the most expensive (average of $347). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from HOU to IL?
Find hourly flight availability from Houston to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 18, 2026.
Unlike at noon, when flights are generally more expensive, you can save up to 47% on flights from Houston to Illinois by exploring options for tickets in the evening.
What is the cheapest day to fly from Houston to Illinois?
Use this chart to determine the cheapest time to fly round-trip from Houston to Illinois. Price data was last updated on October 17, 2026.
Travelers seeking maximum savings on their Houston to Illinois flight should consider departing on Thursday afternoons when fares are most often at their lowest. Monday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
Reviews of airlines servicing Illinois
Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated October 18, 2026.
Read reviews from past customers who have flown Southwest,Delta, andUnited Airlines from Houston to Illinois. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Food
7.0
Overall
7.9
Boarding
8.1
Entertainment
7.5
Crew
8.6
Comfort
8.0
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Food
7.0
Overall
7.9
Boarding
8.1
Entertainment
7.5
Crew
8.6
Comfort
8.0
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Food
7.0
Overall
7.9
Boarding
8.1
Entertainment
7.5
Crew
8.6
Comfort
8.0
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Food
7.0
Overall
7.9
Boarding
8.1
Entertainment
7.5
Crew
8.6
Comfort
8.0
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Food
7.0
Overall
7.9
Boarding
8.1
Entertainment
7.5
Crew
8.6
Comfort
8.0
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Food
7.0
Overall
7.9
Boarding
8.1
Entertainment
7.5
Crew
8.6
Comfort
8.0
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Related info for your journey
Find useful and relevant information for your journey from Houston to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Houston to Illinois
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Complete your trip
Complete your trip to Illinois by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Houston to Illinois by cabin class
Find flights from Houston to Illinois, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Houston and Illinois flights
Browse other Houston and Illinois flight options. Last updated on October 18, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Houston to Illinois flights
Consider these flights traveling from Houston to Illinois.
Top 6 airlines flying from Houston to Illinois
Discover the top 6 airlines that operate flights from Houston to Illinois. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated October 18, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$64 | Average$193 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$160 | Average$365 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$177 | Average$379 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$209 | Average$424 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$228 | Average$328 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$268 | Average$309 | FlexibilityNo cancel fee | On-time62% |