United Flight UA4540 Deals & Information (2025/2026)

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United Flight 4540 Route Deals From $214

The cheapest prices found with in the last 7 days for return flights were $189 and $214 for one-way flights to O'Hare Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Sun, Dec 21 - Wed, Dec 31
CHA
Chattanooga Metropolitan
ORD
O'Hare Intl.
$189 Roundtrip, found 5 hours ago
$189
Roundtrip
found 5 hours ago
Select United flight, departing Sun, Dec 21 from Chattanooga Metropolitan to O'Hare Intl., returning Wed, Dec 31, priced at $189 found 5 hours ago
Sat, Oct 4 - Tue, Oct 7
CHA
Chattanooga Metropolitan
ORD
O'Hare Intl.
$193 Roundtrip, found 1 day ago
$193
Roundtrip
found 1 day ago
Select United flight, departing Sat, Oct 4 from Chattanooga Metropolitan to O'Hare Intl., returning Tue, Oct 7, priced at $193 found 1 day ago
Fri, Sep 26 - Thu, Oct 2
CHA
Chattanooga Metropolitan
ORD
O'Hare Intl.
$193 Roundtrip, found 6 days ago
$193
Roundtrip
found 6 days ago
Select United flight, departing Fri, Sep 26 from Chattanooga Metropolitan to O'Hare Intl., returning Thu, Oct 2, priced at $193 found 6 days ago
Sat, Oct 4 - Tue, Oct 7
CHA
Chattanooga Metropolitan
ORD
O'Hare Intl.
$196 Roundtrip, found 1 day ago
$196
Roundtrip
found 1 day ago
Select United flight, departing Sat, Oct 4 from Chattanooga Metropolitan to O'Hare Intl., returning Tue, Oct 7, priced at $196 found 1 day ago
Fri, Sep 26 - Thu, Oct 2
CHA
Chattanooga Metropolitan
ORD
O'Hare Intl.
$197 Roundtrip, found 6 days ago
$197
Roundtrip
found 6 days ago
Select United flight, departing Fri, Sep 26 from Chattanooga Metropolitan to O'Hare Intl., returning Thu, Oct 2, priced at $197 found 6 days ago
Sat, Nov 22 - Sun, Nov 23
CHA
Chattanooga Metropolitan
ORD
O'Hare Intl.
$210 Roundtrip, found 4 days ago
$210
Roundtrip
found 4 days ago
Select United flight, departing Sat, Nov 22 from Chattanooga Metropolitan to O'Hare Intl., returning Sun, Nov 23, priced at $210 found 4 days ago
Sat, Oct 4 - Tue, Oct 7
CHA
Chattanooga Metropolitan
ORD
O'Hare Intl.
$213 Roundtrip, found 1 day ago
$213
Roundtrip
found 1 day ago
Select United flight, departing Sat, Oct 4 from Chattanooga Metropolitan to O'Hare Intl., returning Tue, Oct 7, priced at $213 found 1 day ago
Thu, Oct 2 - Tue, Oct 7
CHA
Chattanooga Metropolitan
ORD
O'Hare Intl.
$217 Roundtrip, found 6 days ago
$217
Roundtrip
found 6 days ago
Select United flight, departing Thu, Oct 2 from Chattanooga Metropolitan to O'Hare Intl., returning Tue, Oct 7, priced at $217 found 6 days ago
Sat, Oct 18 - Sun, Oct 19
CHA
Chattanooga Metropolitan
ORD
O'Hare Intl.
$223 Roundtrip, found 5 hours ago
$223
Roundtrip
found 5 hours ago
Select United flight, departing Sat, Oct 18 from Chattanooga Metropolitan to O'Hare Intl., returning Sun, Oct 19, priced at $223 found 5 hours ago
Wed, Dec 17 - Wed, Dec 24
CHA
Chattanooga Metropolitan
ORD
O'Hare Intl.
$224 Roundtrip, found 6 days ago
$224
Roundtrip
found 6 days ago
Select United flight, departing Wed, Dec 17 from Chattanooga Metropolitan to O'Hare Intl., returning Wed, Dec 24, priced at $224 found 6 days ago
Mon, Sep 15 - Mon, Sep 22
CHA
Chattanooga Metropolitan
ORD
O'Hare Intl.
$242 Roundtrip, found 6 days ago
$242
Roundtrip
found 6 days ago
Select United flight, departing Mon, Sep 15 from Chattanooga Metropolitan to O'Hare Intl., returning Mon, Sep 22, priced at $242 found 6 days ago
Sat, Oct 18 - Sun, Oct 19
CHA
Chattanooga Metropolitan
ORD
O'Hare Intl.
$244 Roundtrip, found 5 hours ago
$244
Roundtrip
found 5 hours ago
Select United flight, departing Sat, Oct 18 from Chattanooga Metropolitan to O'Hare Intl., returning Sun, Oct 19, priced at $244 found 5 hours ago
Thu, Sep 25 - Mon, Sep 29
CHA
Chattanooga Metropolitan
ORD
O'Hare Intl.
$245 Roundtrip, found 6 days ago
$245
Roundtrip
found 6 days ago
Select United flight, departing Thu, Sep 25 from Chattanooga Metropolitan to O'Hare Intl., returning Mon, Sep 29, priced at $245 found 6 days ago
Sat, Nov 22 - Sun, Nov 23
CHA
Chattanooga Metropolitan
ORD
O'Hare Intl.
$246 Roundtrip, found 4 days ago
$246
Roundtrip
found 4 days ago
Select United flight, departing Sat, Nov 22 from Chattanooga Metropolitan to O'Hare Intl., returning Sun, Nov 23, priced at $246 found 4 days ago
Sun, Dec 21 - Wed, Dec 31
CHA
Chattanooga Metropolitan
ORD
O'Hare Intl.
$249 Roundtrip, found 5 hours ago
$249
Roundtrip
found 5 hours ago
Select United flight, departing Sun, Dec 21 from Chattanooga Metropolitan to O'Hare Intl., returning Wed, Dec 31, priced at $249 found 5 hours ago
Wed, Sep 10 - Mon, Sep 15
CHA
Chattanooga Metropolitan
ORD
O'Hare Intl.
$253 Roundtrip, found 5 days ago
$253
Roundtrip
found 5 days ago
Select United flight, departing Wed, Sep 10 from Chattanooga Metropolitan to O'Hare Intl., returning Mon, Sep 15, priced at $253 found 5 days ago
Fri, Sep 19 - Sun, Sep 21
CHA
Chattanooga Metropolitan
ORD
O'Hare Intl.
$253 Roundtrip, found 1 day ago
$253
Roundtrip
found 1 day ago
Select United flight, departing Fri, Sep 19 from Chattanooga Metropolitan to O'Hare Intl., returning Sun, Sep 21, priced at $253 found 1 day ago

Frequently asked questions

What route does flight number UA4540 take?
Flight number UA4540 operates straight from Eppley Airfield to O'Hare Airport. During this trip, expect to be in the air for approximately 1 hour and 39 minutes. Consider booking ahead to secure your preferred seat.
What kind of plane is on flight number UA4540?
The Canadair (Bombardier) Regional Jet 550 is the kind of plane most commonly used for flight number UA4540. Usually, this flight jets off from Omaha, NE Airport (OMA-Eppley Field) and comes in to land at O'Hare Intl. Airport (ORD).
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 UA4540 flight with Travelocity, please visit our Customer Service Portal.