United Flight 3556 Deals & Information (2026/2027)

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United Flight 3556 Route Deals From $104

The cheapest prices found with in the last 7 days for return flights were $117 and $104 for one-way flights to Lambert-St. Louis Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, Nov 21 - Mon, Nov 23
ORD
O'Hare Intl.
STL
Lambert-St. Louis Intl.
$117 Roundtrip, found 1 day ago
$117
Roundtrip
found 1 day ago
Select United flight, departing Sat, Nov 21 from O'Hare Intl. to Lambert-St. Louis Intl., returning Mon, Nov 23, priced at $117 found 1 day ago
Sat, Nov 21 - Mon, Nov 23
ORD
O'Hare Intl.
STL
Lambert-St. Louis Intl.
$128 Roundtrip, found 1 day ago
$128
Roundtrip
found 1 day ago
Select United flight, departing Sat, Nov 21 from O'Hare Intl. to Lambert-St. Louis Intl., returning Mon, Nov 23, priced at $128 found 1 day ago
Sat, Nov 21 - Mon, Nov 23
ORD
O'Hare Intl.
STL
Lambert-St. Louis Intl.
$150 Roundtrip, found 1 day ago
$150
Roundtrip
found 1 day ago
Select United flight, departing Sat, Nov 21 from O'Hare Intl. to Lambert-St. Louis Intl., returning Mon, Nov 23, priced at $150 found 1 day ago
Sat, Nov 21 - Mon, Nov 23
ORD
O'Hare Intl.
STL
Lambert-St. Louis Intl.
$162 Roundtrip, found 1 day ago
$162
Roundtrip
found 1 day ago
Select United flight, departing Sat, Nov 21 from O'Hare Intl. to Lambert-St. Louis Intl., returning Mon, Nov 23, priced at $162 found 1 day ago
Sat, Nov 21 - Mon, Nov 23
ORD
O'Hare Intl.
STL
Lambert-St. Louis Intl.
$173 Roundtrip, found 1 day ago
$173
Roundtrip
found 1 day ago
Select United flight, departing Sat, Nov 21 from O'Hare Intl. to Lambert-St. Louis Intl., returning Mon, Nov 23, priced at $173 found 1 day ago
Sat, Nov 21 - Mon, Nov 23
ORD
O'Hare Intl.
STL
Lambert-St. Louis Intl.
$195 Roundtrip, found 1 day ago
$195
Roundtrip
found 1 day ago
Select United flight, departing Sat, Nov 21 from O'Hare Intl. to Lambert-St. Louis Intl., returning Mon, Nov 23, priced at $195 found 1 day ago
Sat, Nov 21 - Mon, Nov 23
ORD
O'Hare Intl.
STL
Lambert-St. Louis Intl.
$197 Roundtrip, found 1 day ago
$197
Roundtrip
found 1 day ago
Select United flight, departing Sat, Nov 21 from O'Hare Intl. to Lambert-St. Louis Intl., returning Mon, Nov 23, priced at $197 found 1 day ago
Sat, Nov 21 - Mon, Nov 23
ORD
O'Hare Intl.
STL
Lambert-St. Louis Intl.
$207 Roundtrip, found 1 day ago
$207
Roundtrip
found 1 day ago
Select United flight, departing Sat, Nov 21 from O'Hare Intl. to Lambert-St. Louis Intl., returning Mon, Nov 23, priced at $207 found 1 day ago
Sat, Nov 21 - Mon, Nov 23
ORD
O'Hare Intl.
STL
Lambert-St. Louis Intl.
$208 Roundtrip, found 1 day ago
$208
Roundtrip
found 1 day ago
Select United flight, departing Sat, Nov 21 from O'Hare Intl. to Lambert-St. Louis Intl., returning Mon, Nov 23, priced at $208 found 1 day ago
Sat, Nov 21 - Mon, Nov 23
ORD
O'Hare Intl.
STL
Lambert-St. Louis Intl.
$218 Roundtrip, found 1 day ago
$218
Roundtrip
found 1 day ago
Select United flight, departing Sat, Nov 21 from O'Hare Intl. to Lambert-St. Louis Intl., returning Mon, Nov 23, priced at $218 found 1 day ago

Frequently asked questions

What route does flight number UA3556 take?
UA3556 is used on multiple routes. Typically, UA3556 flies straight from Birmingham Intl. Airport (BHM) to ORD. If this is your route, you'll be flying for around 2 hours and 9 minutes.
What kind of plane is on flight number UA3556?
Chances are you'll be boarding an Embraer 175 if you've booked a ticket on flight UA3556 from Birmingham-Shuttlesworth International Airport to ORD. It's the most commonly used aircraft type 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 UA3556 flight with Travelocity, please visit our Customer Service Portal.