Cheapest Day to Buy Flights from Chicago to Houston
Low Fare Calendar — Chicago to Houston
When to book vs. when to fly — Chicago → Houston
Live data from recent Aviasales searches for ORD → IAH, plus a booking rule of thumb.
Lowest indicative per-adult round-trip fares seen in Aviasales searches — confirmed live on the booking site before payment.
See the cheapest month’s fares ↗Search any date — Chicago → Houston
Flight options — Chicago → Houston
Recently-seen round-trip fares — click any flight for details, alternatives and booking.
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FAQ — ORD → IAH
How much is a flight from Chicago to Houston?
Prices vary by season and departure day. The Low Fare Calendar on this page shows the cheapest fare for every day of the coming year between Chicago (ORD) and Houston (IAH).
Which airlines fly from Chicago to Houston?
The Chicago → Houston route covers about 1,489 km and usually 1–3 h nonstop. Multiple carriers operate it — search FlyTiming to compare every airline and agency serving ORD → IAH in one search.
What is the cheapest day to fly from Chicago to Houston?
It varies by month. The price card on this page highlights the cheapest month and the historically cheapest day of the week to fly this route — the Low Fare Calendar below marks low-fare days in green.
When is the best time to book flights from Chicago to Houston?
As a rule of thumb, fares on international routes are usually lowest roughly 3–12 weeks before departure — and northern-summer peak (June–August) usually means the highest fares — book early or aim for the shoulder months. The calendar below is the fastest way to spot the cheapest months for Chicago → Houston.