United Flight 3540 Deals & Information (2026/2027)

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United Flight 3540 Route Deals From $84

The cheapest prices found with in the last 7 days for return flights were $163 and $84 for one-way flights to Washington Dulles Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Sun, Apr 19 - Mon, Apr 20
LGA
LaGuardia
IAD
Washington Dulles Intl.
$163 Roundtrip, just found
$163
Roundtrip
just found
Select United flight, departing Sun, Apr 19 from LaGuardia to Washington Dulles Intl., returning Mon, Apr 20, priced at $163 just found
Sun, Sep 20 - Sat, Sep 26
LGA
LaGuardia
IAD
Washington Dulles Intl.
$179 Roundtrip, found 8 hours ago
$179
Roundtrip
found 8 hours ago
Select United flight, departing Sun, Sep 20 from LaGuardia to Washington Dulles Intl., returning Sat, Sep 26, priced at $179 found 8 hours ago
Fri, Apr 17 - Sun, Apr 19
LGA
LaGuardia
IAD
Washington Dulles Intl.
$184 Roundtrip, found 7 hours ago
$184
Roundtrip
found 7 hours ago
Select United flight, departing Fri, Apr 17 from LaGuardia to Washington Dulles Intl., returning Sun, Apr 19, priced at $184 found 7 hours ago
Fri, Apr 10 - Sun, Apr 12
LGA
LaGuardia
IAD
Washington Dulles Intl.
$187 Roundtrip, found 6 hours ago
$187
Roundtrip
found 6 hours ago
Select United flight, departing Fri, Apr 10 from LaGuardia to Washington Dulles Intl., returning Sun, Apr 12, priced at $187 found 6 hours ago
Sun, Apr 19 - Mon, Apr 20
LGA
LaGuardia
IAD
Washington Dulles Intl.
$189 Roundtrip, just found
$189
Roundtrip
just found
Select United flight, departing Sun, Apr 19 from LaGuardia to Washington Dulles Intl., returning Mon, Apr 20, priced at $189 just found
Sat, Apr 11 - Sun, Apr 12
LGA
LaGuardia
IAD
Washington Dulles Intl.
$195 Roundtrip, found 6 hours ago
$195
Roundtrip
found 6 hours ago
Select United flight, departing Sat, Apr 11 from LaGuardia to Washington Dulles Intl., returning Sun, Apr 12, priced at $195 found 6 hours ago
Fri, Apr 17 - Sun, Apr 19
LGA
LaGuardia
IAD
Washington Dulles Intl.
$198 Roundtrip, found 4 days ago
$198
Roundtrip
found 4 days ago
Select United flight, departing Fri, Apr 17 from LaGuardia to Washington Dulles Intl., returning Sun, Apr 19, priced at $198 found 4 days ago
Thu, Jun 4 - Sun, Jun 7
LGA
LaGuardia
IAD
Washington Dulles Intl.
$201 Roundtrip, found 5 days ago
$201
Roundtrip
found 5 days ago
Select United flight, departing Thu, Jun 4 from LaGuardia to Washington Dulles Intl., returning Sun, Jun 7, priced at $201 found 5 days ago
Fri, Apr 10 - Sat, Apr 11
LGA
LaGuardia
IAD
Washington Dulles Intl.
$201 Roundtrip, found 6 hours ago
$201
Roundtrip
found 6 hours ago
Select United flight, departing Fri, Apr 10 from LaGuardia to Washington Dulles Intl., returning Sat, Apr 11, priced at $201 found 6 hours ago
Tue, Apr 21 - Sun, Apr 26
LGA
LaGuardia
IAD
Washington Dulles Intl.
$203 Roundtrip, found 5 days ago
$203
Roundtrip
found 5 days ago
Select United flight, departing Tue, Apr 21 from LaGuardia to Washington Dulles Intl., returning Sun, Apr 26, priced at $203 found 5 days ago
Fri, Apr 10 - Sun, Apr 12
LGA
LaGuardia
IAD
Washington Dulles Intl.
$212 Roundtrip, found 6 hours ago
$212
Roundtrip
found 6 hours ago
Select United flight, departing Fri, Apr 10 from LaGuardia to Washington Dulles Intl., returning Sun, Apr 12, priced at $212 found 6 hours ago
Fri, Apr 17 - Sun, Apr 19
LGA
LaGuardia
IAD
Washington Dulles Intl.
$219 Roundtrip, found 4 days ago
$219
Roundtrip
found 4 days ago
Select United flight, departing Fri, Apr 17 from LaGuardia to Washington Dulles Intl., returning Sun, Apr 19, priced at $219 found 4 days ago
Tue, Apr 7 - Wed, Apr 8
LGA
LaGuardia
IAD
Washington Dulles Intl.
$225 Roundtrip, found 3 days ago
$225
Roundtrip
found 3 days ago
Select United flight, departing Tue, Apr 7 from LaGuardia to Washington Dulles Intl., returning Wed, Apr 8, priced at $225 found 3 days ago
Fri, Apr 10 - Sat, Apr 11
LGA
LaGuardia
IAD
Washington Dulles Intl.
$226 Roundtrip, found 6 hours ago
$226
Roundtrip
found 6 hours ago
Select United flight, departing Fri, Apr 10 from LaGuardia to Washington Dulles Intl., returning Sat, Apr 11, priced at $226 found 6 hours ago
Fri, Apr 10 - Sat, Apr 11
LGA
LaGuardia
IAD
Washington Dulles Intl.
$228 Roundtrip, found 6 hours ago
$228
Roundtrip
found 6 hours ago
Select United flight, departing Fri, Apr 10 from LaGuardia to Washington Dulles Intl., returning Sat, Apr 11, priced at $228 found 6 hours 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.