United Flight UA3540 Deals & Information (2025/2026)

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United Flight 3540 Route Deals From $89

The cheapest prices found with in the last 7 days for return flights were $181 and $89 for one-way flights to Pittsburgh Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Aug 20 - Sun, Sep 7
IAD
Washington Dulles Intl.
PIT
Pittsburgh Intl.
$181 Roundtrip, found 4 days ago
$181
Roundtrip
found 4 days ago
Select United flight, departing Wed, Aug 20 from Washington Dulles Intl. to Pittsburgh Intl., returning Sun, Sep 7, priced at $181 found 4 days ago
Fri, Sep 19 - Sun, Sep 21
IAD
Washington Dulles Intl.
PIT
Pittsburgh Intl.
$188 Roundtrip, found 3 days ago
$188
Roundtrip
found 3 days ago
Select United flight, departing Fri, Sep 19 from Washington Dulles Intl. to Pittsburgh Intl., returning Sun, Sep 21, priced at $188 found 3 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.