United Flight 378 Deals & Information (2025/2026)

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United Flight 378 Route Deals From $60

The cheapest prices found with in the last 7 days for return flights were $117 and $60 for one-way flights to O'Hare Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Nov 11 - Fri, Nov 14
BOS
Logan Intl.
ORD
O'Hare Intl.
$117 Roundtrip, found 1 hour ago
$117
Roundtrip
found 1 hour ago
Select United flight, departing Tue, Nov 11 from Logan Intl. to O'Hare Intl., returning Fri, Nov 14, priced at $117 found 1 hour ago
Fri, Sep 26 - Mon, Sep 29
BOS
Logan Intl.
ORD
O'Hare Intl.
$139 Roundtrip, just found
$139
Roundtrip
just found
Select United flight, departing Fri, Sep 26 from Logan Intl. to O'Hare Intl., returning Mon, Sep 29, priced at $139 just found
Tue, Sep 23 - Tue, Sep 30
BOS
Logan Intl.
ORD
O'Hare Intl.
$154 Roundtrip, found 5 hours ago
$154
Roundtrip
found 5 hours ago
Select United flight, departing Tue, Sep 23 from Logan Intl. to O'Hare Intl., returning Tue, Sep 30, priced at $154 found 5 hours ago

Frequently asked questions

What route does flight number UA378 take?
UA378 travels between IAD and Sacramento Airport and flies direct. This service typically takes 5 hours and 53 minutes.
What kind of plane is on flight number UA378?
The route for UA378 is predominantly Washington Dulles Intl. Airport (IAD) to SMF, and the Boeing 737-900 is the type of plane you'll probably be flying on.
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 UA378 flight with Travelocity, please visit our Customer Service Portal.