United Flight AA1156 Deals & Information (2025/2026)

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United Flight 1156 Route Deals From $46

The cheapest prices found with in the last 7 days for return flights were $77 and $46 for one-way flights to O'Hare Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Mon, Aug 4 - Wed, Aug 6
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$77 Roundtrip, found 3 days ago
$77
Roundtrip
found 3 days ago
Select United flight, departing Mon, Aug 4 from Lambert-St. Louis Intl. to O'Hare Intl., returning Wed, Aug 6, priced at $77 found 3 days ago
Mon, Aug 4 - Wed, Aug 6
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$84 Roundtrip, found 3 days ago
$84
Roundtrip
found 3 days ago
Select United flight, departing Mon, Aug 4 from Lambert-St. Louis Intl. to O'Hare Intl., returning Wed, Aug 6, priced at $84 found 3 days ago
Wed, Jul 30 - Wed, Aug 13
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$93 Roundtrip, found 1 day ago
$93
Roundtrip
found 1 day ago
Select United flight, departing Wed, Jul 30 from Lambert-St. Louis Intl. to O'Hare Intl., returning Wed, Aug 13, priced at $93 found 1 day ago
Mon, Aug 4 - Wed, Aug 6
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$94 Roundtrip, found 3 days ago
$94
Roundtrip
found 3 days ago
Select United flight, departing Mon, Aug 4 from Lambert-St. Louis Intl. to O'Hare Intl., returning Wed, Aug 6, priced at $94 found 3 days ago
Mon, Aug 4 - Wed, Aug 6
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$96 Roundtrip, found 3 days ago
$96
Roundtrip
found 3 days ago
Select United flight, departing Mon, Aug 4 from Lambert-St. Louis Intl. to O'Hare Intl., returning Wed, Aug 6, priced at $96 found 3 days ago
Mon, Aug 4 - Wed, Aug 6
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$109 Roundtrip, found 3 days ago
$109
Roundtrip
found 3 days ago
Select United flight, departing Mon, Aug 4 from Lambert-St. Louis Intl. to O'Hare Intl., returning Wed, Aug 6, priced at $109 found 3 days ago
Tue, Aug 5 - Sat, Aug 9
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$114 Roundtrip, found 4 days ago
$114
Roundtrip
found 4 days ago
Select United flight, departing Tue, Aug 5 from Lambert-St. Louis Intl. to O'Hare Intl., returning Sat, Aug 9, priced at $114 found 4 days ago
Mon, Aug 4 - Wed, Aug 6
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$116 Roundtrip, found 3 days ago
$116
Roundtrip
found 3 days ago
Select United flight, departing Mon, Aug 4 from Lambert-St. Louis Intl. to O'Hare Intl., returning Wed, Aug 6, priced at $116 found 3 days ago
Wed, Jul 30 - Thu, Jul 31
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$123 Roundtrip, found 1 hour ago
$123
Roundtrip
found 1 hour ago
Select United flight, departing Wed, Jul 30 from Lambert-St. Louis Intl. to O'Hare Intl., returning Thu, Jul 31, priced at $123 found 1 hour ago
Mon, Aug 4 - Wed, Aug 6
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$127 Roundtrip, found 3 days ago
$127
Roundtrip
found 3 days ago
Select United flight, departing Mon, Aug 4 from Lambert-St. Louis Intl. to O'Hare Intl., returning Wed, Aug 6, priced at $127 found 3 days ago
Mon, Aug 4 - Wed, Aug 6
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$135 Roundtrip, found 3 days ago
$135
Roundtrip
found 3 days ago
Select United flight, departing Mon, Aug 4 from Lambert-St. Louis Intl. to O'Hare Intl., returning Wed, Aug 6, priced at $135 found 3 days ago

Frequently asked questions

What route does flight number UA1156 take?
UA1156 is used on multiple routes, but the most common is between IAD and Newark Airport. If your flight goes direct, you'll disembark the plane in roughly 1 hour and 19 minutes. Multi-stop flights can also use this number, as can flights on other routes.
How often is UA1156 on time?
Meeting a special someone at the airport? If you're taking to the skies with United Airlines flight number UA1156 from IAD to Liberty Intl. Airport (EWR), this service runs according to schedule 87% of the time. On the rare instance it is delayed, the average time you'll wait is 35 minutes. One of the many reasons that this journey has a 2.75-star rating.
What kind of plane is on flight number UA1156?
If you've booked a ticket on flight UA1156 from Washington Dulles Intl. Airport (IAD) to Newark, NJ Airport (EWR-Liberty Intl.), there's a good chance you'll be jetting off on a Boeing 737-900. This flight number serves many routes, but this is the most common one.
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 UA1156 flight with Travelocity, please visit our Customer Service Portal.