Cheap United flights Ontario (ONT) to London (LHR)

Cheap United flights Ontario (ONT) to London (LHR)

Prices were available within the past 7 days and start at for one-way flights and $1,479 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Jun 30 - Mon, Jul 20

ONT

Ontario

LHR

London

$1,479 Roundtrip, found 15 hours ago

$1,479

Roundtrip

found 15 hours ago

Select United flight, departing Tue, Jun 30 from Ontario to London, returning Mon, Jul 20, priced at $1,479 found 15 hours ago

Tue, Jun 30 - Sun, Jul 19

ONT

Ontario

LHR

London

$1,529 Roundtrip, found 15 hours ago

$1,529

Roundtrip

found 15 hours ago

Select United flight, departing Tue, Jun 30 from Ontario to London, returning Sun, Jul 19, priced at $1,529 found 15 hours ago

Sat, Jun 27 - Mon, Jul 20

ONT

Ontario

LHR

London

$1,549 Roundtrip, found 15 hours ago

$1,549

Roundtrip

found 15 hours ago

Select United flight, departing Sat, Jun 27 from Ontario to London, returning Mon, Jul 20, priced at $1,549 found 15 hours ago

Thu, Jul 2 - Sun, Jul 19

ONT

Ontario

LHR

London

$1,599 Roundtrip, found 15 hours ago

$1,599

Roundtrip

found 15 hours ago

Select United flight, departing Thu, Jul 2 from Ontario to London, returning Sun, Jul 19, priced at $1,599 found 15 hours ago