British Airways Flight 66 Deals & Information (2025/2026)

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British Airways Flight 66 Route Deals From $414

The cheapest prices found with in the last 7 days for return flights were $484 and $414 for one-way flights to Heathrow for the period specified. Prices and availability are subject to change. Additional terms apply.

Sun, Nov 2 - Wed, Nov 12
PHL
Philadelphia Intl.
LHR
Heathrow
$484 Roundtrip, found 8 hours ago
$484
Roundtrip
found 8 hours ago
Select British Airways flight, departing Sun, Nov 2 from Philadelphia Intl. to Heathrow, returning Wed, Nov 12, priced at $484 found 8 hours ago
Tue, Dec 2 - Thu, Dec 11
PHL
Philadelphia Intl.
LHR
Heathrow
$485 Roundtrip, found 7 hours ago
$485
Roundtrip
found 7 hours ago
Select British Airways flight, departing Tue, Dec 2 from Philadelphia Intl. to Heathrow, returning Thu, Dec 11, priced at $485 found 7 hours ago
Sun, Nov 2 - Wed, Nov 12
PHL
Philadelphia Intl.
LHR
Heathrow
$489 Roundtrip, found 8 hours ago
$489
Roundtrip
found 8 hours ago
Select British Airways flight, departing Sun, Nov 2 from Philadelphia Intl. to Heathrow, returning Wed, Nov 12, priced at $489 found 8 hours ago
Tue, Dec 2 - Thu, Dec 11
PHL
Philadelphia Intl.
LHR
Heathrow
$490 Roundtrip, found 7 hours ago
$490
Roundtrip
found 7 hours ago
Select British Airways flight, departing Tue, Dec 2 from Philadelphia Intl. to Heathrow, returning Thu, Dec 11, priced at $490 found 7 hours ago
Mon, Dec 29 - Thu, Jan 8
PHL
Philadelphia Intl.
LHR
Heathrow
$492 Roundtrip, found 1 day ago
$492
Roundtrip
found 1 day ago
Select British Airways flight, departing Mon, Dec 29 from Philadelphia Intl. to Heathrow, returning Thu, Jan 8, priced at $492 found 1 day ago
Mon, Feb 16 - Tue, Feb 24
PHL
Philadelphia Intl.
LHR
Heathrow
$493 Roundtrip, found 9 hours ago
$493
Roundtrip
found 9 hours ago
Select British Airways flight, departing Mon, Feb 16 from Philadelphia Intl. to Heathrow, returning Tue, Feb 24, priced at $493 found 9 hours ago
Mon, Aug 4 - Fri, Aug 22
PHL
Philadelphia Intl.
LHR
Heathrow
$495 Roundtrip, found 9 hours ago
$495
Roundtrip
found 9 hours ago
Select British Airways flight, departing Mon, Aug 4 from Philadelphia Intl. to Heathrow, returning Fri, Aug 22, priced at $495 found 9 hours ago
Mon, Oct 6 - Mon, Oct 13
PHL
Philadelphia Intl.
LHR
Heathrow
$497 Roundtrip, found 4 hours ago
$497
Roundtrip
found 4 hours ago
Select British Airways flight, departing Mon, Oct 6 from Philadelphia Intl. to Heathrow, returning Mon, Oct 13, priced at $497 found 4 hours ago
Mon, Aug 4 - Fri, Aug 22
PHL
Philadelphia Intl.
LHR
Heathrow
$499 Roundtrip, found 9 hours ago
$499
Roundtrip
found 9 hours ago
Select British Airways flight, departing Mon, Aug 4 from Philadelphia Intl. to Heathrow, returning Fri, Aug 22, priced at $499 found 9 hours ago
Mon, Aug 4 - Fri, Aug 22
PHL
Philadelphia Intl.
LHR
Heathrow
$501 Roundtrip, found 9 hours ago
$501
Roundtrip
found 9 hours ago
Select British Airways flight, departing Mon, Aug 4 from Philadelphia Intl. to Heathrow, returning Fri, Aug 22, priced at $501 found 9 hours ago
Wed, Nov 19 - Wed, Dec 10
PHL
Philadelphia Intl.
LHR
Heathrow
$507 Roundtrip, found 10 hours ago
$507
Roundtrip
found 10 hours ago
Select British Airways flight, departing Wed, Nov 19 from Philadelphia Intl. to Heathrow, returning Wed, Dec 10, priced at $507 found 10 hours ago
Mon, Aug 4 - Fri, Aug 22
PHL
Philadelphia Intl.
LHR
Heathrow
$508 Roundtrip, found 9 hours ago
$508
Roundtrip
found 9 hours ago
Select British Airways flight, departing Mon, Aug 4 from Philadelphia Intl. to Heathrow, returning Fri, Aug 22, priced at $508 found 9 hours ago
Tue, Aug 5 - Tue, Aug 12
PHL
Philadelphia Intl.
LHR
Heathrow
$509 Roundtrip, just found
$509
Roundtrip
just found
Select British Airways flight, departing Tue, Aug 5 from Philadelphia Intl. to Heathrow, returning Tue, Aug 12, priced at $509 just found
Tue, Aug 5 - Tue, Aug 12
PHL
Philadelphia Intl.
LHR
Heathrow
$512 Roundtrip, just found
$512
Roundtrip
just found
Select British Airways flight, departing Tue, Aug 5 from Philadelphia Intl. to Heathrow, returning Tue, Aug 12, priced at $512 just found
Tue, Aug 5 - Tue, Aug 12
PHL
Philadelphia Intl.
LHR
Heathrow
$514 Roundtrip, just found
$514
Roundtrip
just found
Select British Airways flight, departing Tue, Aug 5 from Philadelphia Intl. to Heathrow, returning Tue, Aug 12, priced at $514 just found