United Flight 1156 Deals & Information (2025/2026)

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United Flight 1156 Route Deals From $40

The cheapest prices found with in the last 7 days for return flights were $77 and $40 for one-way flights to O'Hare Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Sep 9 - Wed, Sep 10
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$77 Roundtrip, found 1 hour ago
$77
Roundtrip
found 1 hour ago
Select United flight, departing Tue, Sep 9 from Lambert-St. Louis Intl. to O'Hare Intl., returning Wed, Sep 10, priced at $77 found 1 hour ago
Tue, Sep 9 - Wed, Sep 10
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$105 Roundtrip, found 1 hour ago
$105
Roundtrip
found 1 hour ago
Select United flight, departing Tue, Sep 9 from Lambert-St. Louis Intl. to O'Hare Intl., returning Wed, Sep 10, priced at $105 found 1 hour ago
Tue, Sep 9 - Wed, Sep 10
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$112 Roundtrip, found 1 hour ago
$112
Roundtrip
found 1 hour ago
Select United flight, departing Tue, Sep 9 from Lambert-St. Louis Intl. to O'Hare Intl., returning Wed, Sep 10, priced at $112 found 1 hour ago
Sat, Aug 16 - Sun, Aug 17
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$114 Roundtrip, found 1 day ago
$114
Roundtrip
found 1 day ago
Select United flight, departing Sat, Aug 16 from Lambert-St. Louis Intl. to O'Hare Intl., returning Sun, Aug 17, priced at $114 found 1 day ago
Sat, Aug 23 - Sun, Aug 24
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$130 Roundtrip, found 2 days ago
$130
Roundtrip
found 2 days ago
Select United flight, departing Sat, Aug 23 from Lambert-St. Louis Intl. to O'Hare Intl., returning Sun, Aug 24, priced at $130 found 2 days ago
Sat, Aug 16 - Sun, Aug 17
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$131 Roundtrip, found 1 day ago
$131
Roundtrip
found 1 day ago
Select United flight, departing Sat, Aug 16 from Lambert-St. Louis Intl. to O'Hare Intl., returning Sun, Aug 17, priced at $131 found 1 day ago
Wed, Oct 29 - Thu, Oct 30
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$134 Roundtrip, found 5 days ago
$134
Roundtrip
found 5 days ago
Select United flight, departing Wed, Oct 29 from Lambert-St. Louis Intl. to O'Hare Intl., returning Thu, Oct 30, priced at $134 found 5 days ago
Fri, Aug 22 - Tue, Sep 2
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$136 Roundtrip, found 1 day ago
$136
Roundtrip
found 1 day ago
Select United flight, departing Fri, Aug 22 from Lambert-St. Louis Intl. to O'Hare Intl., returning Tue, Sep 2, priced at $136 found 1 day ago
Thu, Oct 23 - Tue, Nov 4
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$137 Roundtrip, found 1 day ago
$137
Roundtrip
found 1 day ago
Select United flight, departing Thu, Oct 23 from Lambert-St. Louis Intl. to O'Hare Intl., returning Tue, Nov 4, priced at $137 found 1 day ago
Tue, Sep 16 - Fri, Sep 19
STL
Lambert-St. Louis Intl.
ORD
O'Hare Intl.
$139 Roundtrip, found 3 days ago
$139
Roundtrip
found 3 days ago
Select United flight, departing Tue, Sep 16 from Lambert-St. Louis Intl. to O'Hare Intl., returning Fri, Sep 19, priced at $139 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.