American Airlines Flight 100 Deals & Information (2026/2027)

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American Airlines Flight 100 Route Deals From $299

The cheapest prices found with in the last 7 days for return flights were $491 and $299 for one-way flights to Heathrow for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Mar 4 - Sat, Mar 21
JFK
John F. Kennedy Intl.
LHR
Heathrow
$491 Roundtrip, found 14 hours ago
$491
Roundtrip
found 14 hours ago
Select American Airlines flight, departing Wed, Mar 4 from John F. Kennedy Intl. to Heathrow, returning Sat, Mar 21, priced at $491 found 14 hours ago

Frequently asked questions

What route does flight number AA100 take?
AA100 flies straight from JFK Airport to Heathrow Airport. During this journey, expect to be in the air for roughly 7 hours and 13 minutes. It pays to book ahead to lock in your preferred seat.
How often is AA100 on time?
American Airlines flight number AA100 from New York, NY Airport (JFK-John F. Kennedy Intl.) to Heathrow Airport operates on schedule 95% of the time — so you can relax with confidence knowing that you'll touch down at your destination ASAP. If your journey happens to be delayed, you're likely to wait about 17 minutes. This route has a star rating of 4.25.
What terminal does AA100 fly out of?
Flight number AA100 runs between John F. Kennedy Intl. Airport (JFK) and Heathrow Airport, and travelers taking this flight commonly jet off from Terminal 8.
What kind of plane is on flight number AA100?
The route for flight number AA100 is nearly always New York, NY Airport (JFK-John F. Kennedy Intl.) to Heathrow Airport (LHR), and the Boeing 777-300ER is the type of plane you're likely to be traveling on.
If I am not able to travel due to COVID-19, can I change my flight to a later date?
For more info about changing your AA100 flight with Travelocity, please visit our Customer Service Portal.