British Airways Flight AA1543 Deals & Information (2025/2026)

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British Airways Flight 1543 Route Deals From $388

The cheapest prices found with in the last 7 days for return flights were $505 and $388 for one-way flights to Heathrow for the period specified. Prices and availability are subject to change. Additional terms apply.

Sun, Aug 3 - Mon, Aug 11
ORD
O'Hare Intl.
LHR
Heathrow
$505 Roundtrip, found 17 hours ago
$505
Roundtrip
found 17 hours ago
Select British Airways flight, departing Sun, Aug 3 from O'Hare Intl. to Heathrow, returning Mon, Aug 11, priced at $505 found 17 hours ago
Sun, Aug 10 - Tue, Aug 19
ORD
O'Hare Intl.
LHR
Heathrow
$525 Roundtrip, just found
$525
Roundtrip
just found
Select British Airways flight, departing Sun, Aug 10 from O'Hare Intl. to Heathrow, returning Tue, Aug 19, priced at $525 just found
Sun, Aug 3 - Mon, Aug 11
ORD
O'Hare Intl.
LHR
Heathrow
$525 Roundtrip, found 17 hours ago
$525
Roundtrip
found 17 hours ago
Select British Airways flight, departing Sun, Aug 3 from O'Hare Intl. to Heathrow, returning Mon, Aug 11, priced at $525 found 17 hours ago