British Airways Flight AA66 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 $605 and $414 for one-way flights to Heathrow for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Nov 19 - Wed, Dec 10
PHL
Philadelphia Intl.
LHR
Heathrow
$605 Roundtrip, just found
$605
Roundtrip
just found
Select British Airways flight, departing Wed, Nov 19 from Philadelphia Intl. to Heathrow, returning Wed, Dec 10, priced at $605 just found
Wed, Nov 12 - Wed, Nov 19
PHL
Philadelphia Intl.
LHR
Heathrow
$605 Roundtrip, found 2 days ago
$605
Roundtrip
found 2 days ago
Select British Airways flight, departing Wed, Nov 12 from Philadelphia Intl. to Heathrow, returning Wed, Nov 19, priced at $605 found 2 days ago
Wed, Nov 19 - Wed, Dec 10
PHL
Philadelphia Intl.
LHR
Heathrow
$609 Roundtrip, just found
$609
Roundtrip
just found
Select British Airways flight, departing Wed, Nov 19 from Philadelphia Intl. to Heathrow, returning Wed, Dec 10, priced at $609 just found
Mon, Dec 1 - Wed, Dec 10
PHL
Philadelphia Intl.
LHR
Heathrow
$611 Roundtrip, found 2 days ago
$611
Roundtrip
found 2 days ago
Select British Airways flight, departing Mon, Dec 1 from Philadelphia Intl. to Heathrow, returning Wed, Dec 10, priced at $611 found 2 days ago
Sun, Oct 12 - Wed, Nov 5
PHL
Philadelphia Intl.
LHR
Heathrow
$612 Roundtrip, found 2 days ago
$612
Roundtrip
found 2 days ago
Select British Airways flight, departing Sun, Oct 12 from Philadelphia Intl. to Heathrow, returning Wed, Nov 5, priced at $612 found 2 days ago
Wed, Nov 26 - Fri, Dec 5
PHL
Philadelphia Intl.
LHR
Heathrow
$613 Roundtrip, found 1 hour ago
$613
Roundtrip
found 1 hour ago
Select British Airways flight, departing Wed, Nov 26 from Philadelphia Intl. to Heathrow, returning Fri, Dec 5, priced at $613 found 1 hour ago
Mon, Aug 11 - Wed, Aug 20
PHL
Philadelphia Intl.
LHR
Heathrow
$615 Roundtrip, just found
$615
Roundtrip
just found
Select British Airways flight, departing Mon, Aug 11 from Philadelphia Intl. to Heathrow, returning Wed, Aug 20, priced at $615 just found
Sat, Nov 1 - Thu, Nov 13
PHL
Philadelphia Intl.
LHR
Heathrow
$616 Roundtrip, found 4 days ago
$616
Roundtrip
found 4 days ago
Select British Airways flight, departing Sat, Nov 1 from Philadelphia Intl. to Heathrow, returning Thu, Nov 13, priced at $616 found 4 days ago
Sun, Dec 7 - Mon, Dec 15
PHL
Philadelphia Intl.
LHR
Heathrow
$617 Roundtrip, found 2 days ago
$617
Roundtrip
found 2 days ago
Select British Airways flight, departing Sun, Dec 7 from Philadelphia Intl. to Heathrow, returning Mon, Dec 15, priced at $617 found 2 days ago
Tue, Nov 18 - Tue, Nov 25
PHL
Philadelphia Intl.
LHR
Heathrow
$618 Roundtrip, found 4 hours ago
$618
Roundtrip
found 4 hours ago
Select British Airways flight, departing Tue, Nov 18 from Philadelphia Intl. to Heathrow, returning Tue, Nov 25, priced at $618 found 4 hours ago
Mon, Aug 11 - Wed, Aug 20
PHL
Philadelphia Intl.
LHR
Heathrow
$619 Roundtrip, just found
$619
Roundtrip
just found
Select British Airways flight, departing Mon, Aug 11 from Philadelphia Intl. to Heathrow, returning Wed, Aug 20, priced at $619 just found
Tue, Nov 18 - Tue, Nov 25
PHL
Philadelphia Intl.
LHR
Heathrow
$620 Roundtrip, found 4 hours ago
$620
Roundtrip
found 4 hours ago
Select British Airways flight, departing Tue, Nov 18 from Philadelphia Intl. to Heathrow, returning Tue, Nov 25, priced at $620 found 4 hours ago
Mon, Dec 1 - Wed, Dec 10
PHL
Philadelphia Intl.
LHR
Heathrow
$621 Roundtrip, found 2 days ago
$621
Roundtrip
found 2 days ago
Select British Airways flight, departing Mon, Dec 1 from Philadelphia Intl. to Heathrow, returning Wed, Dec 10, priced at $621 found 2 days ago
Tue, Aug 5 - Thu, Aug 21
PHL
Philadelphia Intl.
LHR
Heathrow
$622 Roundtrip, found 5 hours ago
$622
Roundtrip
found 5 hours ago
Select British Airways flight, departing Tue, Aug 5 from Philadelphia Intl. to Heathrow, returning Thu, Aug 21, priced at $622 found 5 hours ago
Tue, Sep 30 - Thu, Oct 9
PHL
Philadelphia Intl.
LHR
Heathrow
$636 Roundtrip, just found
$636
Roundtrip
just found
Select British Airways flight, departing Tue, Sep 30 from Philadelphia Intl. to Heathrow, returning Thu, Oct 9, priced at $636 just found