American Airlines Flight AA2121 Deals & Information (2025/2026)

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American Airlines Flight 2121 Route Deals From $70

The cheapest prices found with in the last 7 days for return flights were $147 and $70 for one-way flights to O'Hare Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Sep 4 - Mon, Sep 8
MCI
Kansas City Intl.
ORD
O'Hare Intl.
$147 Roundtrip, found 2 hours ago
$147
Roundtrip
found 2 hours ago
Select American Airlines flight, departing Thu, Sep 4 from Kansas City Intl. to O'Hare Intl., returning Mon, Sep 8, priced at $147 found 2 hours ago
Sun, Aug 31 - Tue, Sep 2
MCI
Kansas City Intl.
ORD
O'Hare Intl.
$168 Roundtrip, found 2 hours ago
$168
Roundtrip
found 2 hours ago
Select American Airlines flight, departing Sun, Aug 31 from Kansas City Intl. to O'Hare Intl., returning Tue, Sep 2, priced at $168 found 2 hours ago
Tue, Sep 9 - Thu, Sep 18
MCI
Kansas City Intl.
ORD
O'Hare Intl.
$184 Roundtrip, found 4 days ago
$184
Roundtrip
found 4 days ago
Select American Airlines flight, departing Tue, Sep 9 from Kansas City Intl. to O'Hare Intl., returning Thu, Sep 18, priced at $184 found 4 days ago
Tue, Sep 9 - Thu, Sep 18
MCI
Kansas City Intl.
ORD
O'Hare Intl.
$187 Roundtrip, found 4 days ago
$187
Roundtrip
found 4 days ago
Select American Airlines flight, departing Tue, Sep 9 from Kansas City Intl. to O'Hare Intl., returning Thu, Sep 18, priced at $187 found 4 days ago
Sun, Aug 31 - Tue, Sep 2
MCI
Kansas City Intl.
ORD
O'Hare Intl.
$191 Roundtrip, found 2 hours ago
$191
Roundtrip
found 2 hours ago
Select American Airlines flight, departing Sun, Aug 31 from Kansas City Intl. to O'Hare Intl., returning Tue, Sep 2, priced at $191 found 2 hours ago
Sun, Aug 31 - Tue, Sep 2
MCI
Kansas City Intl.
ORD
O'Hare Intl.
$199 Roundtrip, found 2 hours ago
$199
Roundtrip
found 2 hours ago
Select American Airlines flight, departing Sun, Aug 31 from Kansas City Intl. to O'Hare Intl., returning Tue, Sep 2, priced at $199 found 2 hours ago
Sun, Aug 31 - Tue, Sep 2
MCI
Kansas City Intl.
ORD
O'Hare Intl.
$209 Roundtrip, found 2 hours ago
$209
Roundtrip
found 2 hours ago
Select American Airlines flight, departing Sun, Aug 31 from Kansas City Intl. to O'Hare Intl., returning Tue, Sep 2, priced at $209 found 2 hours ago
Thu, Sep 4 - Mon, Sep 8
MCI
Kansas City Intl.
ORD
O'Hare Intl.
$210 Roundtrip, found 2 hours ago
$210
Roundtrip
found 2 hours ago
Select American Airlines flight, departing Thu, Sep 4 from Kansas City Intl. to O'Hare Intl., returning Mon, Sep 8, priced at $210 found 2 hours ago

Frequently asked questions

What route does flight number AA2121 take?
AA2121 operates direct from BOS to National Airport. During this trip, you can expect to be in the air for around 1 hour and 40 minutes. Book ahead to secure your preferred seat.
What terminal does AA2121 fly out of?
AA2121 runs between BOS and DCA, and those taking this flight commonly depart from Terminal B.
What kind of plane is on flight number AA2121?
You'll probably find yourself cruising aboard an Airbus A319 if you're on flight AA2121. This flight typically leaves from Logan Intl. Airport and touches down at National Airport.
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 AA2121 flight with Travelocity, please visit our Customer Service Portal.