American Airlines Flight 403 Deals & Information (2025/2026)

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American Airlines Flight 403 Route Deals From $46

The cheapest prices found with in the last 7 days for return flights were $98 and $46 for one-way flights to Buffalo Niagara Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Fri, Oct 3 - Mon, Oct 6
ORD
O'Hare Intl.
BUF
Buffalo Niagara Intl.
$98 Roundtrip, found 1 day ago
$98
Roundtrip
found 1 day ago
Select American Airlines flight, departing Fri, Oct 3 from O'Hare Intl. to Buffalo Niagara Intl., returning Mon, Oct 6, priced at $98 found 1 day ago
Sat, Sep 13 - Thu, Sep 18
ORD
O'Hare Intl.
BUF
Buffalo Niagara Intl.
$118 Roundtrip, found 6 hours ago
$118
Roundtrip
found 6 hours ago
Select American Airlines flight, departing Sat, Sep 13 from O'Hare Intl. to Buffalo Niagara Intl., returning Thu, Sep 18, priced at $118 found 6 hours ago
Fri, Oct 3 - Mon, Oct 6
ORD
O'Hare Intl.
BUF
Buffalo Niagara Intl.
$139 Roundtrip, found 1 day ago
$139
Roundtrip
found 1 day ago
Select American Airlines flight, departing Fri, Oct 3 from O'Hare Intl. to Buffalo Niagara Intl., returning Mon, Oct 6, priced at $139 found 1 day ago
Wed, Oct 15 - Mon, Oct 20
ORD
O'Hare Intl.
BUF
Buffalo Niagara Intl.
$145 Roundtrip, found 10 hours ago
$145
Roundtrip
found 10 hours ago
Select American Airlines flight, departing Wed, Oct 15 from O'Hare Intl. to Buffalo Niagara Intl., returning Mon, Oct 20, priced at $145 found 10 hours ago
Fri, Oct 3 - Mon, Oct 6
ORD
O'Hare Intl.
BUF
Buffalo Niagara Intl.
$158 Roundtrip, found 1 day ago
$158
Roundtrip
found 1 day ago
Select American Airlines flight, departing Fri, Oct 3 from O'Hare Intl. to Buffalo Niagara Intl., returning Mon, Oct 6, priced at $158 found 1 day ago

Frequently asked questions

What route does flight number AA403 take?
AA403 flies straight from Miami, FL Airport (MIA-Miami Intl.) to Charlotte-Douglas Intl. Airport (CLT) in 2 hours and 14 minutes. It can take other routes though, some of which may be multi-stop flights. Keep an eye out for this when locking in your seat to avoid any mix-ups.
What kind of plane is on flight number AA403?
There's every chance you'll be setting off on the Boeing 737-800 if you're traveling from Miami Intl. Airport (MIA) to Charlotte-Douglas Intl. Airport (CLT), one of a few routes used for flight number AA403.
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 AA403 flight with Travelocity, please visit our Customer Service Portal.