Cheapest Day to Buy Flights from Houston to Chicago
Houston to Chicago is 1,489 km (925 mi) great-circle — usually 1–3 h nonstop. Fares typically bottom out 3–12 weeks before departure; the calendar below shows the cheapest price for every day of the next 12 months.
Check live prices on Aviasales ↗Low Fare Calendar — Houston to Chicago
When to book vs. when to fly — Houston → Chicago
Live data from recent Aviasales searches for IAH → ORD, 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 — Houston → Chicago
Flight options — Houston → Chicago
Recently-seen round-trip fares — click any flight for details, alternatives and booking.
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FAQ — IAH → ORD
How much is a flight from Houston to Chicago?
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 Houston (IAH) and Chicago (ORD).
Which airlines fly from Houston to Chicago?
The Houston → Chicago 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 IAH → ORD in one search.
What is the cheapest day to fly from Houston to Chicago?
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 Houston to Chicago?
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 Houston → Chicago.