Cheap flights from Illinois to Houston
ORD — HOU
Nov 18 — Nov 251
Round-trip
1 adult, Economy
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1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Find flight deals from Illinois to Houston
Keep the following information in mind while searching for Illinois to Houston flight deals. Data was last updated October 19, 2026.
Popular in | June |
|---|---|
Cheapest in | January |
Average price | $286 |
Cheapflights Insights
Everything you need to know about your flight from Illinois to Houston
How far ahead should I book a flight from Illinois to Houston?
To ensure you get the cheapest price possible for a flight from Illinois to Houston, you should look to book at least 64 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
What is the cheapest month to book a flight from Illinois to Houston?
Currently, January is the cheapest month in which you can book a flight from Illinois to Houston (average of $226). Flying from Illinois to Houston 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 IL to HOU?
Find hourly flight availability from Illinois to Houston. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 19, 2026.
When flying from Illinois to Houston, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 11% versus a flight in the evening.
What is the cheapest day to fly from Illinois to Houston?
Use this chart to determine the cheapest time to fly round-trip from Illinois to Houston. Price data was last updated on October 17, 2026.
Travelers seeking maximum savings on their Illinois to Houston flight should consider departing on Tuesday 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.
Related info for your journey
Find useful and relevant information for your journey from Illinois to Houston. 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 Illinois to Houston
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Complete your trip
Complete your trip to Houston by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Illinois to Houston by cabin class
Find flights from Illinois to Houston, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Illinois and Houston flights
Browse other Illinois and Houston flight options. Last updated on October 19, 2026.
Popular flight searches
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Illinois to Houston flights
Consider these flights traveling from Illinois to Houston.
Top 6 airlines flying from Illinois to Houston
Discover the top 6 airlines that operate flights from Illinois to Houston. 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 19, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$63 | Average$201 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$140 | Average$373 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$165 | Average$407 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$202 | Average$293 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$203 | Average$298 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$224 | Average$327 | FlexibilityNo cancel fee | On-time63% |