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Union

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Union Flights as Low as $38

Prices found within past 7 days. Prices and availability subject to change. Additional terms may apply.

Frontier Airlines
Wed, Oct 28 - Wed, Nov 4
ATL
Hartsfield-Jackson Atlanta Intl.
STL
Lambert-St. Louis Intl.
$38 Roundtrip, found 20 hours ago
$38
Roundtrip
found 20 hours ago
Select Frontier Airlines flight, departing Wed, Oct 28 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Wed, Nov 4, priced at $38 found 20 hours ago
Frontier Airlines
Wed, Oct 28 - Mon, Nov 2
ATL
Hartsfield-Jackson Atlanta Intl.
STL
Lambert-St. Louis Intl.
$43 Roundtrip, found 4 hours ago
$43
Roundtrip
found 4 hours ago
Select Frontier Airlines flight, departing Wed, Oct 28 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Mon, Nov 2, priced at $43 found 4 hours ago
Frontier Airlines
Wed, Dec 2 - Fri, Dec 4
ATL
Hartsfield-Jackson Atlanta Intl.
STL
Lambert-St. Louis Intl.
$48 Roundtrip, found 5 hours ago
$48
Roundtrip
found 5 hours ago
Select Frontier Airlines flight, departing Wed, Dec 2 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Fri, Dec 4, priced at $48 found 5 hours ago
Frontier Airlines
Wed, Oct 28 - Wed, Nov 4
DEN
Denver Intl.
STL
Lambert-St. Louis Intl.
$88 Roundtrip, found 1 day ago
$88
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Wed, Oct 28 from Denver Intl. to Lambert-St. Louis Intl., returning Wed, Nov 4, priced at $88 found 1 day ago
Delta
Sat, Dec 5 - Sat, Dec 5
ATL
Hartsfield-Jackson Atlanta Intl.
STL
Lambert-St. Louis Intl.
$112 Roundtrip, found 1 day ago
$112
Roundtrip
found 1 day ago
Select Delta flight, departing Sat, Dec 5 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Sat, Dec 5, priced at $112 found 1 day ago
American Airlines
Wed, Oct 21 - Wed, Oct 28
ORD
O'Hare Intl.
STL
Lambert-St. Louis Intl.
$117 Roundtrip, found 1 hour ago
$117
Roundtrip
found 1 hour ago
Select American Airlines flight, departing Wed, Oct 21 from O'Hare Intl. to Lambert-St. Louis Intl., returning Wed, Oct 28, priced at $117 found 1 hour ago
Southwest Airlines
Mon, Oct 19 - Mon, Nov 2
BNA
Nashville Intl.
STL
Lambert-St. Louis Intl.
$117 Roundtrip, found 10 hours ago
$117
Roundtrip
found 10 hours ago
Select Southwest Airlines flight, departing Mon, Oct 19 from Nashville Intl. to Lambert-St. Louis Intl., returning Mon, Nov 2, priced at $117 found 10 hours ago
United
Wed, Oct 21 - Wed, Oct 28
ORD
O'Hare Intl.
STL
Lambert-St. Louis Intl.
$117 Roundtrip, found 1 hour ago
$117
Roundtrip
found 1 hour ago
Select United flight, departing Wed, Oct 21 from O'Hare Intl. to Lambert-St. Louis Intl., returning Wed, Oct 28, priced at $117 found 1 hour ago
Frontier Airlines
Mon, Nov 2 - Mon, Nov 16
DFW
Dallas-Fort Worth Intl.
STL
Lambert-St. Louis Intl.
$143 Roundtrip, found 23 hours ago
$143
Roundtrip
found 23 hours ago
Select Frontier Airlines flight, departing Mon, Nov 2 from Dallas-Fort Worth Intl. to Lambert-St. Louis Intl., returning Mon, Nov 16, priced at $143 found 23 hours ago
Southern Airways Express
Mon, Oct 19 - Mon, Nov 2
BNA
Nashville Intl.
STL
Lambert-St. Louis Intl.
$172 Roundtrip, found 10 hours ago
$172
Roundtrip
found 10 hours ago
Select Southern Airways Express flight, departing Mon, Oct 19 from Nashville Intl. to Lambert-St. Louis Intl., returning Mon, Nov 2, priced at $172 found 10 hours ago
Frontier Airlines
Sat, Nov 14 - Wed, Nov 18
ONT
Ontario Intl. Airport
STL
Lambert-St. Louis Intl.
$174 Roundtrip, just found
$174
Roundtrip
just found
Select Frontier Airlines flight, departing Sat, Nov 14 from Ontario Intl. Airport to Lambert-St. Louis Intl., returning Wed, Nov 18, priced at $174 just found
Frontier Airlines
Fri, Oct 16 - Wed, Oct 21
FLL
Fort Lauderdale - Hollywood Intl.
STL
Lambert-St. Louis Intl.
$186 Roundtrip, found 5 days ago
$186
Roundtrip
found 5 days ago
Select Frontier Airlines flight, departing Fri, Oct 16 from Fort Lauderdale - Hollywood Intl. to Lambert-St. Louis Intl., returning Wed, Oct 21, priced at $186 found 5 days ago
Southwest Airlines
Mon, Oct 12 - Thu, Oct 29
DAL
Love Field
STL
Lambert-St. Louis Intl.
$252 Roundtrip, found 4 days ago
$252
Roundtrip
found 4 days ago
Select Southwest Airlines flight, departing Mon, Oct 12 from Love Field to Lambert-St. Louis Intl., returning Thu, Oct 29, priced at $252 found 4 days ago
Frontier Airlines
Sat, Nov 21 - Thu, Dec 10
BUF
Buffalo Niagara Intl.
STL
Lambert-St. Louis Intl.
$258 Roundtrip, found 2 days ago
$258
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Sat, Nov 21 from Buffalo Niagara Intl. to Lambert-St. Louis Intl., returning Thu, Dec 10, priced at $258 found 2 days ago
Delta
Mon, Oct 19 - Mon, Oct 26
SJC
Norman Y. Mineta San Jose Intl.
STL
Lambert-St. Louis Intl.
$260 Roundtrip, found 4 days ago
$260
Roundtrip
found 4 days ago
Select Delta flight, departing Mon, Oct 19 from Norman Y. Mineta San Jose Intl. to Lambert-St. Louis Intl., returning Mon, Oct 26, priced at $260 found 4 days ago
Alaska Airlines
Wed, Oct 21 - Wed, Oct 28
SJC
Norman Y. Mineta San Jose Intl.
STL
Lambert-St. Louis Intl.
$347 Roundtrip, found 14 hours ago
$347
Roundtrip
found 14 hours ago
Select Alaska Airlines flight, departing Wed, Oct 21 from Norman Y. Mineta San Jose Intl. to Lambert-St. Louis Intl., returning Wed, Oct 28, priced at $347 found 14 hours ago

Cheap Flights to Union

Fall in love at first flight with your vacation to Union by saving a ton of cash on your last-minute cheap flight. There’s no more scouring the internet for a good deal—book your flight to Union on Hotwire, and you’ll be up, up, and on a getaway in no time.

Because once the wheels are down in Union, the good times start rolling. So buckle up, you’re in for a fun ride.

Frequently Asked Questions About flights to Union

Don’t waste your time on endless searches for cheap airline tickets oneway or roundtrip. We’ll have you on your way to Union with a tiny bag of pretzels in your hand before you can say “tray tables in the upright position”—and for a ticket price that works for your vacay budget.

So all you have to worry about is where you’re headed after the STL airport.

What is the cheapest month to fly to Union?

Airline ticket prices fluctuate all the time, depending on the day of the week or the month of the year. The cheapest round trip flights to Union are in October, but when you book your flight on Hotwire, savings are always in season.

How many airlines fly to Union?

Variety is the spice of life, even when it comes to booking your next trip. Want options for airlines? You’ll find 16 to choose from for your flight to Union.

What airport is best to fly into Union?

When you’re planning your trip to Union, convenience is the name of the game. Luckily, Union Spirit of St. Louis Airport is nearby so you can deplane and get going on checking off everything on your Union must-do list.

How much are flights to Union?

Got very cheap flights on your vacation itinerary? When you book your airline tickets to Union on Hotwire, you may just get what’s on your getaway wish list. With tickets as low as $38, you’ll have leftover cash for at least a magazine and a bottle of water at the airport book store.

How to get cheap flights to Union?

The trick to saving a stack of cash on your flight to Union? Snatch up that Hotwire flight deal when you see a killer rate because it could be gone in a flash. And with flights as low as $38 right now, why wait?

Union Flight Information
Destination airport
Lambert-St. Louis Intl.
Destination airport IATA code
STL
Roundtrip price
$38

Last Minute Hotel Deals in Union

Super 8 by Wyndham Union

Super 8 by Wyndham Union

2 out of 5
1015 East Main Street Union MO
Book a stay at this business-friendly hotel in Union. Enjoy free breakfast, free WiFi, and free parking. Our guests praise the helpful staff and the clean rooms ...
8.2/10 Very Good! (691 reviews)
"The property was very clean. Didn’t hear anything after we got into the room the ac was quiet and the bed comfortable"

Reviewed on Sep 13, 2026

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Super 8 by Wyndham Union
The Wildwood Hotel

The Wildwood Hotel

3.5 out of 5
2801 Fountain Pl Wildwood MO
Book a stay at this business-friendly hotel in Wildwood. Enjoy free breakfast, free WiFi, and free parking. Our guests praise the helpful staff and the convenient ...
9.2/10 Wonderful! (1,668 reviews)
"No room, reset or towels or trash pickup when staying two nights. 20mi from St Louis"

Reviewed on Sep 19, 2026

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The Wildwood Hotel
Pinemark Inn & Suites

Pinemark Inn & Suites

2 out of 5
866 South Outer Road St. Clair MO
Stay at this hotel in St. Clair. Enjoy free breakfast, free WiFi, and free parking. Our guests praise the breakfast and the pool in our reviews. Popular attractions ...
9.6/10 Exceptional! (1,002 reviews)
"Loved our room! The shower was awesome and the hot tube was very relaxing. The room had two large smart TVs. The bed and pillows were very comfy! The pool was clean with nice seating. The breakfast was great. This Place has the charm and feel of an older hotel but with modern conveniences. Will definitely ..."

Reviewed on Sep 16, 2026

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Pinemark Inn & Suites
Holiday Inn St. Louis West Six Flags by IHG

Holiday Inn St. Louis West Six Flags by IHG

3 out of 5
4901 Six Flags Rd Eureka MO
Book a stay at this family-friendly hotel in Eureka. Enjoy free WiFi, free parking, and breakfast (surcharge). Our guests praise the pool and the restaurant ...
9/10 Wonderful! (1,002 reviews)
"Everything was great, kids enjoyed themselves"

Reviewed on Sep 19, 2026

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Holiday Inn St. Louis West Six Flags by IHG
Comfort Inn Near Six Flags St. Louis

Comfort Inn Near Six Flags St. Louis

2.5 out of 5
1320 Thornton St Pacific MO
Book a stay at this business-friendly hotel in Pacific. Enjoy free breakfast, free WiFi, and free parking. Our guests praise the helpful staff and the clean ...
8.4/10 Very Good! (993 reviews)
"Definitely could have been a bit cleaner, we had a rust stain on the wall coming from the sprinkler head"

Reviewed on Sep 19, 2026

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Comfort Inn Near Six Flags St. Louis
Comfort Inn Sullivan

Comfort Inn Sullivan

2.5 out of 5
736 S Service Rd W Sullivan MO
Book a stay at this business-friendly hotel in Sullivan. Enjoy free breakfast, free WiFi, and free parking. Our guests praise the helpful staff in our reviews. ...
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Comfort Inn Sullivan
Baymont by Wyndham Sullivan

Baymont by Wyndham Sullivan

2.5 out of 5
275 North Service Road West Sullivan MO
Book a stay at this business-friendly hotel in Sullivan. Enjoy free breakfast, free WiFi, and free parking. Our guests praise the helpful staff and the clean ...
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Baymont by Wyndham Sullivan
Super 8 by Wyndham St. Clair MO

Super 8 by Wyndham St. Clair MO

2 out of 5
1010 S Outer Rd St. Clair MO
Book a stay at this business-friendly hotel in St. Clair. Enjoy free breakfast, free WiFi, and free parking. Our guests praise the helpful staff in our reviews. ...
7/10 Good! (1,000 reviews)
"Room was clean, bedding was clean, there were no signs of pests which is extremely important for us, the staff was polite, and helpful. The only complaint we have is we were put in a room next to the rear entry which when other guests were arriving and leaving the entry door was slamming all hours ..."

Reviewed on Sep 7, 2026

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Super 8 by Wyndham St. Clair MO
See all 398 properties in Union
Lowest nightly price found within the past 24 hours based on a 1 night stay for 2 adults. Prices and availability subject to change. Additional terms may apply.