Search Cheap Flights to
Union

Search 400 airlines and 321,000 hotels worldwide.

Stop Planning & Start Exploring

FREE 24 hour cancellation on most flights

Union Flights as Low as $58

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

Frontier Airlines
Thu, Jul 10 - Sat, Jul 19
ATL
Hartsfield-Jackson Atlanta Intl.
STL
Lambert-St. Louis Intl.
$58 Roundtrip, found 2 days ago
$58
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Thu, Jul 10 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Sat, Jul 19, priced at $58 found 2 days ago
Spirit Airlines
Fri, Jul 18 - Mon, Aug 4
DTW
Detroit Metropolitan Wayne County
STL
Lambert-St. Louis Intl.
$60 Roundtrip, found 2 days ago
$60
Roundtrip
found 2 days ago
Select Spirit Airlines flight, departing Fri, Jul 18 from Detroit Metropolitan Wayne County to Lambert-St. Louis Intl., returning Mon, Aug 4, priced at $60 found 2 days ago
Spirit Airlines
Fri, Jul 18 - Fri, Jul 18
DTW
Detroit Metropolitan Wayne County
STL
Lambert-St. Louis Intl.
$70 Roundtrip, found 1 day ago
$70
Roundtrip
found 1 day ago
Select Spirit Airlines flight, departing Fri, Jul 18 from Detroit Metropolitan Wayne County to Lambert-St. Louis Intl., returning Fri, Jul 18, priced at $70 found 1 day ago
Frontier Airlines
Thu, Aug 21 - Thu, Aug 28
DFW
Dallas-Fort Worth Intl.
STL
Lambert-St. Louis Intl.
$90 Roundtrip, found 12 hours ago
$90
Roundtrip
found 12 hours ago
Select Frontier Airlines flight, departing Thu, Aug 21 from Dallas-Fort Worth Intl. to Lambert-St. Louis Intl., returning Thu, Aug 28, priced at $90 found 12 hours ago
Frontier Airlines
Sat, Oct 4 - Sat, Oct 11
DEN
Denver Intl.
STL
Lambert-St. Louis Intl.
$108 Roundtrip, found 1 day ago
$108
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Sat, Oct 4 from Denver Intl. to Lambert-St. Louis Intl., returning Sat, Oct 11, priced at $108 found 1 day ago
Delta
Fri, Jul 18 - Fri, Jul 18
DTW
Detroit Metropolitan Wayne County
STL
Lambert-St. Louis Intl.
$123 Roundtrip, found 1 day ago
$123
Roundtrip
found 1 day ago
Select Delta flight, departing Fri, Jul 18 from Detroit Metropolitan Wayne County to Lambert-St. Louis Intl., returning Fri, Jul 18, priced at $123 found 1 day ago
American Airlines
Tue, Aug 26 - Tue, Aug 26
DFW
Dallas-Fort Worth Intl.
STL
Lambert-St. Louis Intl.
$136 Roundtrip, found 7 hours ago
$136
Roundtrip
found 7 hours ago
Select American Airlines flight, departing Tue, Aug 26 from Dallas-Fort Worth Intl. to Lambert-St. Louis Intl., returning Tue, Aug 26, priced at $136 found 7 hours ago
United
Mon, Oct 6 - Sat, Oct 11
DEN
Denver Intl.
STL
Lambert-St. Louis Intl.
$157 Roundtrip, just found
$157
Roundtrip
just found
Select United flight, departing Mon, Oct 6 from Denver Intl. to Lambert-St. Louis Intl., returning Sat, Oct 11, priced at $157 just found
United
Wed, Aug 27 - Thu, Sep 4
SEA
Seattle - Tacoma Intl.
STL
Lambert-St. Louis Intl.
$194 Roundtrip, found 1 hour ago
$194
Roundtrip
found 1 hour ago
Select United flight, departing Wed, Aug 27 from Seattle - Tacoma Intl. to Lambert-St. Louis Intl., returning Thu, Sep 4, priced at $194 found 1 hour ago
Delta
Tue, Aug 26 - Tue, Aug 26
DAL
Love Field
STL
Lambert-St. Louis Intl.
$194 Roundtrip, found 1 hour ago
$194
Roundtrip
found 1 hour ago
Select Delta flight, departing Tue, Aug 26 from Love Field to Lambert-St. Louis Intl., returning Tue, Aug 26, priced at $194 found 1 hour ago
Bargain Flight
Thu, Nov 6 - Mon, Nov 10
LAS
Harry Reid Intl.
STL
Lambert-St. Louis Intl.
$206 Roundtrip, found 20 hours ago
$206
Roundtrip
found 20 hours ago
Select Bargain Flight flight, departing Thu, Nov 6 from Harry Reid Intl. to Lambert-St. Louis Intl., returning Mon, Nov 10, priced at $206 found 20 hours ago
Hawaiian Airlines
Mon, Aug 25 - Mon, Sep 1
SEA
Seattle - Tacoma Intl.
STL
Lambert-St. Louis Intl.
$249 Roundtrip, found 3 days ago
$249
Roundtrip
found 3 days ago
Select Hawaiian Airlines flight, departing Mon, Aug 25 from Seattle - Tacoma Intl. to Lambert-St. Louis Intl., returning Mon, Sep 1, priced at $249 found 3 days ago
Bargain Flight
Tue, Sep 23 - Wed, Sep 24
SAN
San Diego Intl.
STL
Lambert-St. Louis Intl.
$263 Roundtrip, found 2 days ago
$263
Roundtrip
found 2 days ago
Select Bargain Flight flight, departing Tue, Sep 23 from San Diego Intl. to Lambert-St. Louis Intl., returning Wed, Sep 24, priced at $263 found 2 days ago
American Airlines
Tue, Sep 23 - Wed, Sep 24
CLD
McClellan-Palomar
STL
Lambert-St. Louis Intl.
$308 Roundtrip, found 3 days ago
$308
Roundtrip
found 3 days ago
Select American Airlines flight, departing Tue, Sep 23 from McClellan-Palomar to Lambert-St. Louis Intl., returning Wed, Sep 24, priced at $308 found 3 days ago
Delta
Sat, Aug 23 - Sat, Aug 30
DAB
Daytona Beach Intl.
STL
Lambert-St. Louis Intl.
$326 Roundtrip, found 3 days ago
$326
Roundtrip
found 3 days ago
Select Delta flight, departing Sat, Aug 23 from Daytona Beach Intl. to Lambert-St. Louis Intl., returning Sat, Aug 30, priced at $326 found 3 days ago
Delta
Fri, Jul 4 - Sat, Jul 12
PSP
Palm Springs Intl.
STL
Lambert-St. Louis Intl.
$400 Roundtrip, found 2 days ago
$400
Roundtrip
found 2 days ago
Select Delta flight, departing Fri, Jul 4 from Palm Springs Intl. to Lambert-St. Louis Intl., returning Sat, Jul 12, priced at $400 found 2 days 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 July, 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 14 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 $58, 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 $58 right now, why wait?

Union Flight Information
Destination airport
Lambert-St. Louis Intl.
Destination airport IATA code
STL
Roundtrip price
$58

Last Minute Hotel Deals in Union

Super 8 by Wyndham Union
Super 8 by Wyndham Union
2 out of 5
1015 East Main Street, I44 Exit 247 Hwy 50, 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 ...
8/10 Very Good! (594 reviews)
"The property was clean and well kept. I had a couple small issues. 1: When I turned off one of the lights, it started flashing and I was concerned about the fire risk. 2: There was a dirty towel left hanging behind the bathroom door. Over all, it was one of the best Super 8's I ever stayed."

Reviewed on Jun 16, 2025

Get rates
Super 8 by Wyndham Union
The Wildwood Hotel
The Wildwood Hotel
3.5 out of 5
2801 Fountain Pl, Wildwood, MO
Stay at this 3.5-star business-friendly hotel in Wildwood. Enjoy free breakfast, free WiFi, and free parking. Our guests praise the helpful staff and the convenient ...
9/10 Wonderful! (1,550 reviews)
"Great overall experience."

Reviewed on Jun 27, 2025

Get rates
The Wildwood Hotel
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
Stay at this 3-star family-friendly hotel in Eureka. Enjoy free WiFi, free parking, and breakfast (surcharge). Our guests praise the pool and the restaurant ...
8.8/10 Excellent! (999 reviews)
"Check in was seamless. Guests were quiet and respectful."

Reviewed on Jun 24, 2025

Get rates
Holiday Inn St. Louis West Six Flags by IHG
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 ...
7.6/10 Good! (1,001 reviews)
"Overall, the room wasn't bad. It was clean, sheets were fresh, towels clean and fresh. The tile was broken and somewhat dirty in the bathroom, behind the door. The toilet area is very narrow, and I'm not a huge person. Also, can we please quit with the 4-6 tiny pillows on king beds? These are very ..."

Reviewed on Jun 23, 2025

Get rates
Baymont by Wyndham Sullivan
Super 8 by Wyndham Eureka/Six Flags Nearby
Super 8 by Wyndham Eureka/Six Flags Nearby
2 out of 5
1733 W 5th St, Eureka, MO
Stay at this hotel in Eureka. Enjoy free breakfast, free WiFi, and free parking. Our guests praise the helpful staff and the clean rooms in our reviews. Popular ...
6.8/10 (1,004 reviews)
"Good value for the hotel. Ac working just fine. Everything was stocked up in the room when arrived."

Reviewed on Jun 25, 2025

Get rates
Super 8 by Wyndham Eureka/Six Flags Nearby
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
Stay at this hotel in St. Clair. Enjoy free breakfast, free WiFi, and free parking. Our guests praise the helpful staff in our reviews. Popular attractions Indian ...
7/10 Good! (849 reviews)
"It was quick and easy to get in and out of and they took very good care ot our sheep when we were off property Thanks so much"

Reviewed on Jun 24, 2025

Get rates
Super 8 by Wyndham St. Clair MO
Americas Best Value Inn Sullivan
Americas Best Value Inn Sullivan
2 out of 5
307 North Service Road, Sullivan, MO
Stay at this motel in Sullivan. Enjoy free breakfast, free WiFi, and free parking. Our guests praise the clean rooms in our reviews. Popular attractions Sullivan ...
7.2/10 Good! (356 reviews)
"I have stayed at this hotel about 3 yrs in a roll. Its quiet and clean, carpet was very nice and clean. Breakfast was very good."

Reviewed on Jun 27, 2025

Get rates
Americas Best Value Inn Sullivan
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 ...
8.2/10 Very Good! (818 reviews)
"It’s was a Nice Stay Room clean just about 10 mins from six flags Breakfast was ok Pool was Cold lol But Fun"

Reviewed on Jun 23, 2025

Get rates
Comfort Inn Near Six Flags St. Louis
See all 347 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.