Cheap flights from Chicago to Allentown
from 171 US$
Compare hundreds of airlines Chicago–Allentown
The cheapest month is usually 2026-09 · 171 US$
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About this route
Compare flights from Chicago to Allentown, a about 1,028 km route (around 1h 47m nonstop). We gather live prices from hundreds of airlines and agencies so you can find the cheapest and book on the official site, with no hidden fees. Direct flights are available. Airlines such as United Airlines operate this route.
When to buy and when to fly
Prices by date
Fares found by date — cheapest days in green.
How to get the best price
Airlines on this route
FAQ
What's the cheapest month to fly Chicago to Allentown?
It's usually 2026-09, from 171 USD. Use the price calendar to compare other dates.
How long is the flight from Chicago to Allentown?
A nonstop flight takes about 1h 47m and covers around 1,028 km. Connecting itineraries take longer.
Are there direct flights from Chicago to Allentown?
Yes, this route has nonstop flights. Filter by "nonstop" to see them.
Which airlines fly from Chicago to Allentown?
United Airlines operate this route, among others. Compare them all in the results.
When should I book Chicago–Allentown flights?
As a rule of thumb, booking 3–8 weeks ahead and avoiding weekends and holidays tends to give the best prices. Use the calendar to spot the cheapest dates.
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Chicago → Allentown · Live fares from 100+ sites — free, with no hidden fees.