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

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

Prices were available within the past 7 days and start at for one-way flights and $1,409 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Sun, Jun 28 - Thu, Jul 16

ONT

Ontario

LHR

London

$1,409 Roundtrip, found 9 hours ago

$1,409

Roundtrip

found 9 hours ago

Select Delta flight, departing Sun, Jun 28 from Ontario to London, returning Thu, Jul 16, priced at $1,409 found 9 hours ago

Fri, Jun 26 - Sun, Jul 19

ONT

Ontario

LHR

London

$1,671 Roundtrip, found 9 hours ago

$1,671

Roundtrip

found 9 hours ago

Select Delta flight, departing Fri, Jun 26 from Ontario to London, returning Sun, Jul 19, priced at $1,671 found 9 hours ago