United Flight AC3542 Deals & Information (2025/2026)

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United Flight 3542 Route Deals From $127

The cheapest prices found with in the last 7 days for return flights were $278 and $127 for one-way flights to Pierre Elliott Trudeau Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Mon, May 19 - Thu, May 22
ORD
O'Hare Intl.
YUL
Pierre Elliott Trudeau Intl.
$278 Roundtrip, found 3 hours ago
$278
Roundtrip
found 3 hours ago
Select United flight, departing Mon, May 19 from O'Hare Intl. to Pierre Elliott Trudeau Intl., returning Thu, May 22, priced at $278 found 3 hours ago

Frequently asked questions

What route does flight number UA3542 take?
UA3542 is used on a number of routes. Mostly, UA3542 flies directly from O’Hare Airport to Hilton Head Island Airport (HHH). If you’ve booked a seat on this route, you’ll be traveling for roughly 2 hours and 29 minutes.
What terminal does UA3542 fly out of?
You’ll likely board from Terminal 2 if you’re booked on a flight out of O’Hare Airport. UA3542 serves a number of different routes, but the direct flight between ORD and Hilton Head Island Airport (HHH) is the most frequently traveled.
What kind of plane is on flight number UA3542?
If you have a seat on flight UA3542 from ORD to HHH, there’s an excellent chance you’ll be traveling aboard the Embraer 175. Flight UA3542 serves several routes, but this is the busiest.
If I am not able to travel due to COVID-19, can I change my flight to a later date?
For more info about changing your UA3542 flight with Travelocity, please visit our Customer Service Portal.