Cheap flights from Chicago (ORD)

United and American mega-hub anchoring the U.S. Midwest

O'Hare is one of the world's busiest airports, located about 27 km northwest of the Chicago Loop and serving as a primary hub for both United Airlines and American Airlines. The airport handles nearly every major U.S. carrier plus a deep bench of transatlantic, transpacific and Latin American operators. Frontier and Spirit add low-cost competition on domestic leisure routes.

Why search this airport on Flightmussy

Airlines flying from Chicago (ORD)

Major carriers: United, American, Delta, Lufthansa, British Airways. Low-cost carriers: Frontier, Spirit, JetBlue.

Popular destinations from Chicago (ORD)

Frequently asked questions

What is the cheapest month to fly from Chicago O'Hare?
Late January, February and early September are reliably the cheapest months from ORD, with transatlantic fares dropping sharpest in the Jan-Feb window. Flightmussy's 12-month fare heatmap shows the exact cheapest week per route, which often falls in the middle of the month.
Which airlines fly out of ORD?
O'Hare is a hub for United and American, plus heavy presence from Delta, Southwest (at MDW), Lufthansa, British Airways, Air France, KLM, Aer Lingus, JAL, ANA and many more. Frontier and Spirit add LCC competition. Flightmussy lists all of them in one no-signup search.
Should I fly out of ORD or MDW?
ORD has more international and long-haul options; MDW skews domestic and is dominated by Southwest. Flightmussy's multi-airport origin filter covers both ORD and MDW (plus RFD) in a single search so you can pick the cheaper terminal automatically.
Are there direct flights from ORD to London?
Yes — United, American and British Airways all run multiple daily nonstops to London Heathrow, with Aer Lingus offering a one-stop via Dublin. Virgin Atlantic returns seasonally. Flightmussy compares every operator side-by-side and surfaces the cheapest week across the year.

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About Flightmussy

Flightmussy is a free flight meta-search built by one person in Oslo. No signup, no ads, no tracking, no email capture. Compare fares across airlines and see 12 months of prices at a glance — including low-cost carriers Google Flights often deprioritises (Widerøe, Wizz Air, Norwegian, Ryanair). Pay with a card at the airline, or use the Crypto button on any result to check out in BTC, ETH, USDT, BNB or AVA via Travala.

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