United Flight 3540 Deals & Information (2025/2026)

Wander Wisely with exceptional service, 24/7 supportOpens in a new window

Feel at ease with free flight cancellations within 24 hours of booking

Change your flight without a fee on select flights

United Flight 3540 Route Deals From $132

The cheapest prices found with in the last 7 days for return flights were $195 and $132 for one-way flights to Pittsburgh Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Jul 29 - Mon, Aug 4
IAD
Washington Dulles Intl.
PIT
Pittsburgh Intl.
$195 Roundtrip, found 4 days ago
$195
Roundtrip
found 4 days ago
Select United flight, departing Tue, Jul 29 from Washington Dulles Intl. to Pittsburgh Intl., returning Mon, Aug 4, priced at $195 found 4 days ago

Frequently asked questions

What route does flight number UA3540 take?
UA3540 takes several routes. The most frequently flown is between Louisville Muhammad Ali Intl. Airport and ORD, which flies direct. This service generally takes 1 hour and 36 minutes. That said, there may possibly be other flights with this number that are multi-stop.
What kind of plane is on flight number UA3540?
If you're considering booking flight UA3540 from Louisville Muhammad Ali Intl. Airport to O'Hare Intl. Airport (ORD), you'll likely be heading off on an Embraer 170. Flight UA3540 serves a number of different routes, but this is the most popular.
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 UA3540 flight with Travelocity, please visit our Customer Service Portal.