United Flight 3540 Deals & Information (2026/2027)

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United Flight 3540 Route Deals From $60

The cheapest prices found with in the last 7 days for return flights were $124 and $60 for one-way flights to Pittsburgh Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Apr 8 - Mon, Apr 13
IAD
Washington Dulles Intl.
PIT
Pittsburgh Intl.
$124 Roundtrip, found 2 days ago
$124
Roundtrip
found 2 days ago
Select United flight, departing Wed, Apr 8 from Washington Dulles Intl. to Pittsburgh Intl., returning Mon, Apr 13, priced at $124 found 2 days ago
Wed, Apr 8 - Mon, Apr 13
IAD
Washington Dulles Intl.
PIT
Pittsburgh Intl.
$137 Roundtrip, found 2 days ago
$137
Roundtrip
found 2 days ago
Select United flight, departing Wed, Apr 8 from Washington Dulles Intl. to Pittsburgh Intl., returning Mon, Apr 13, priced at $137 found 2 days ago
Thu, Apr 23 - Sun, Apr 26
IAD
Washington Dulles Intl.
PIT
Pittsburgh Intl.
$155 Roundtrip, found 2 days ago
$155
Roundtrip
found 2 days ago
Select United flight, departing Thu, Apr 23 from Washington Dulles Intl. to Pittsburgh Intl., returning Sun, Apr 26, priced at $155 found 2 days ago
Wed, Apr 8 - Mon, Apr 13
IAD
Washington Dulles Intl.
PIT
Pittsburgh Intl.
$164 Roundtrip, found 2 days ago
$164
Roundtrip
found 2 days ago
Select United flight, departing Wed, Apr 8 from Washington Dulles Intl. to Pittsburgh Intl., returning Mon, Apr 13, priced at $164 found 2 days ago
Sat, Apr 11 - Sun, Apr 12
IAD
Washington Dulles Intl.
PIT
Pittsburgh Intl.
$177 Roundtrip, found 6 days ago
$177
Roundtrip
found 6 days ago
Select United flight, departing Sat, Apr 11 from Washington Dulles Intl. to Pittsburgh Intl., returning Sun, Apr 12, priced at $177 found 6 days ago
Wed, Apr 8 - Mon, Apr 13
IAD
Washington Dulles Intl.
PIT
Pittsburgh Intl.
$177 Roundtrip, found 2 days ago
$177
Roundtrip
found 2 days ago
Select United flight, departing Wed, Apr 8 from Washington Dulles Intl. to Pittsburgh Intl., returning Mon, Apr 13, priced at $177 found 2 days ago
Wed, Apr 8 - Mon, Apr 13
IAD
Washington Dulles Intl.
PIT
Pittsburgh Intl.
$178 Roundtrip, found 2 days ago
$178
Roundtrip
found 2 days ago
Select United flight, departing Wed, Apr 8 from Washington Dulles Intl. to Pittsburgh Intl., returning Mon, Apr 13, priced at $178 found 2 days ago
Thu, May 14 - Sat, May 16
IAD
Washington Dulles Intl.
PIT
Pittsburgh Intl.
$189 Roundtrip, found 5 days ago
$189
Roundtrip
found 5 days ago
Select United flight, departing Thu, May 14 from Washington Dulles Intl. to Pittsburgh Intl., returning Sat, May 16, priced at $189 found 5 days ago
Sat, Apr 4 - Mon, Apr 6
IAD
Washington Dulles Intl.
PIT
Pittsburgh Intl.
$191 Roundtrip, found 1 day ago
$191
Roundtrip
found 1 day ago
Select United flight, departing Sat, Apr 4 from Washington Dulles Intl. to Pittsburgh Intl., returning Mon, Apr 6, priced at $191 found 1 day ago
Wed, Feb 18 - Wed, Feb 25
IAD
Washington Dulles Intl.
PIT
Pittsburgh Intl.
$201 Roundtrip, found 2 days ago
$201
Roundtrip
found 2 days ago
Select United flight, departing Wed, Feb 18 from Washington Dulles Intl. to Pittsburgh Intl., returning Wed, Feb 25, priced at $201 found 2 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.