Cheap flights to Chicago (ORD)

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Why fly to Chicago?

Chicago is the kind of big American city that rewards a long weekend, and getting there cheaply is easier than most people assume. It's served by two very different airports: O'Hare (ORD), a dual United and American hub with nonstops to nearly everywhere, and Midway (MDW), Southwest's busy stronghold on the South Side that's often closer to the action and frequently cheaper. Because both carriers fight for the same routes, fares into Chicago stay competitive year-round. Once you land, the payoff is one of the country's best skylines, a deep bench of museums along the lakefront, an architecture-boat-tour scene that's worth the splurge, and a food culture that runs from deep-dish and Italian beef to some of the most ambitious dining in the Midwest. The lakefront trail, Millennium Park, and the neighborhoods — Wicker Park, Pilsen, Hyde Park — make it a walkable, transit-friendly trip where you can skip a rental car entirely. The catch every US traveler should plan around is the weather: winters are brutally cold and windy, which is exactly why January and February deliver the year's best deals if you can handle the chill.

Best months to fly to Chicago

January and February are the cheapest months to fly thanks to the cold, while late September and October pair mild weather and fall color with softer fares than the summer peak.

FAQs: cheap flights to Chicago

Should I fly into O'Hare or Midway for the cheapest fare?
Compare both. O'Hare (ORD) has the most nonstop options through United and American, while Midway (MDW) is Southwest territory and is often cheaper and closer to downtown. The right pick depends on your home airport and which carrier serves your route best.
When are flights to Chicago cheapest?
Deep winter — January and February — is the lowest-fare stretch because demand drops when temperatures do. If you'd rather have pleasant weather, the fall shoulder season in late September and October offers a good balance of comfortable conditions and below-summer prices.
Do I need a rental car in Chicago?
Usually not. The CTA trains and buses cover the city and connect both airports to downtown, parking is expensive, and most visitor neighborhoods are walkable. Skipping the rental is one of the easiest ways to keep a Chicago trip affordable.
Is Chicago a good place to find connecting-flight deals?
Yes. O'Hare is one of the largest connecting hubs in the world, so even when Chicago isn't your final stop, routing through ORD can open up cheaper itineraries. It's worth checking O'Hare connections when you're hunting for a deal to other US or international cities.
How far in advance should I book flights to Chicago?
For domestic trips, booking roughly one to three months ahead tends to land the best fares. Because two major hubs compete here, prices are fairly stable, but avoid waiting until the final two weeks before travel when last-minute pricing kicks in.

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Flight tips & guides

Practical advice for booking cheap flights to Chicago and beyond.