American Airlines Flight 3859 Deals & Information (2026/2027)

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American Airlines Flight 3859 Route Deals From $90

The cheapest prices found with in the last 7 days for return flights were $179 and $90 for one-way flights to Logan Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Apr 29 - Sun, May 3
DCA
Ronald Reagan Washington National
BOS
Logan Intl.
$179 Roundtrip, just found
$179
Roundtrip
just found
Select American Airlines flight, departing Wed, Apr 29 from Ronald Reagan Washington National to Logan Intl., returning Sun, May 3, priced at $179 just found
Tue, Mar 24 - Fri, Mar 27
DCA
Ronald Reagan Washington National
BOS
Logan Intl.
$185 Roundtrip, just found
$185
Roundtrip
just found
Select American Airlines flight, departing Tue, Mar 24 from Ronald Reagan Washington National to Logan Intl., returning Fri, Mar 27, priced at $185 just found
Wed, Mar 11 - Fri, Mar 13
DCA
Ronald Reagan Washington National
BOS
Logan Intl.
$190 Roundtrip, found 2 hours ago
$190
Roundtrip
found 2 hours ago
Select American Airlines flight, departing Wed, Mar 11 from Ronald Reagan Washington National to Logan Intl., returning Fri, Mar 13, priced at $190 found 2 hours ago
Fri, Jul 10 - Sun, Jul 12
DCA
Ronald Reagan Washington National
BOS
Logan Intl.
$197 Roundtrip, found 6 hours ago
$197
Roundtrip
found 6 hours ago
Select American Airlines flight, departing Fri, Jul 10 from Ronald Reagan Washington National to Logan Intl., returning Sun, Jul 12, priced at $197 found 6 hours ago
Tue, Mar 24 - Fri, Mar 27
DCA
Ronald Reagan Washington National
BOS
Logan Intl.
$207 Roundtrip, just found
$207
Roundtrip
just found
Select American Airlines flight, departing Tue, Mar 24 from Ronald Reagan Washington National to Logan Intl., returning Fri, Mar 27, priced at $207 just found

Frequently asked questions

What route does flight number AA3859 take?
AA3859 serves multiple routes, but the most common is between MCI and O'Hare Airport. If your flight is direct, you'll step off the plane in roughly 1 hour and 41 minutes. Multi-stop flights can also use this number, as can services on other routes.
What terminal does AA3859 fly out of?
If you're departing from Kansas City Intl. Airport, there's a good chance you'll board from Terminal C. The most popular route for AA3859 is Kansas City Intl. Airport to Chicago, IL Airport (ORD-O'Hare Intl.), which is a nonstop flight.
What kind of plane is on flight number AA3859?
Chances are you'll be traveling aboard an Embraer 175 if you've booked a fare on flight AA3859 from Kansas City Intl. Airport (MCI) to Chicago, IL Airport (ORD-O'Hare Intl.). This is the most commonly used type of aircraft on this route.
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 AA3859 flight with Travelocity, please visit our Customer Service Portal.