United has round-trip flights from Chicago (ORD) to Cancun (CUN) for $164, NONSTOP. Flights October to February. No Weekends. Departures on Monday, Tuesday, Wednesday, and Thursday. Extended Weekends available. Origin/Destination reversible.
Change fees are waived, but United’s “Basic Economy” fares do not include a free carry-on bag. Only a personal item (like a small laptop bag) is free. Seats are randomly assigned for free prior to boarding.
The personal item size on United flights is smaller (9-in/10-in/17-in) than Frontier or Spirit (8-in/14-in/18-in).
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