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Union

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Union Flights as Low as $63

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

Frontier Airlines
Wed, Jul 8 - Wed, Jul 15
ATL
Hartsfield-Jackson Atlanta Intl.
STL
Lambert-St. Louis Intl.
$63 Roundtrip, found 1 day ago
$63
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Wed, Jul 8 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Wed, Jul 15, priced at $63 found 1 day ago
Frontier Airlines
Wed, Jul 8 - Fri, Jul 17
ATL
Hartsfield-Jackson Atlanta Intl.
STL
Lambert-St. Louis Intl.
$73 Roundtrip, found 1 day ago
$73
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Wed, Jul 8 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Fri, Jul 17, priced at $73 found 1 day ago
Frontier Airlines
Tue, Jul 28 - Sat, Aug 8
ATL
Hartsfield-Jackson Atlanta Intl.
STL
Lambert-St. Louis Intl.
$76 Roundtrip, just found
$76
Roundtrip
just found
Select Frontier Airlines flight, departing Tue, Jul 28 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Sat, Aug 8, priced at $76 just found
Frontier Airlines
Mon, Aug 10 - Thu, Aug 20
ATL
Hartsfield-Jackson Atlanta Intl.
STL
Lambert-St. Louis Intl.
$78 Roundtrip, found 1 day ago
$78
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Mon, Aug 10 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Thu, Aug 20, priced at $78 found 1 day ago
Frontier Airlines
Sat, Jul 11 - Wed, Jul 15
ATL
Hartsfield-Jackson Atlanta Intl.
STL
Lambert-St. Louis Intl.
$84 Roundtrip, found 1 day ago
$84
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Sat, Jul 11 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Wed, Jul 15, priced at $84 found 1 day ago
Delta
Tue, Jul 28 - Sat, Aug 8
ATL
Hartsfield-Jackson Atlanta Intl.
STL
Lambert-St. Louis Intl.
$117 Roundtrip, just found
$117
Roundtrip
just found
Select Delta flight, departing Tue, Jul 28 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Sat, Aug 8, priced at $117 just found
Frontier Airlines
Wed, Jul 15 - Sat, Jul 18
MCO
Orlando Intl.
STL
Lambert-St. Louis Intl.
$119 Roundtrip, found 19 hours ago
$119
Roundtrip
found 19 hours ago
Select Frontier Airlines flight, departing Wed, Jul 15 from Orlando Intl. to Lambert-St. Louis Intl., returning Sat, Jul 18, priced at $119 found 19 hours ago
American Airlines
Wed, Jul 29 - Tue, Aug 4
ORD
O'Hare Intl.
STL
Lambert-St. Louis Intl.
$120 Roundtrip, found 21 hours ago
$120
Roundtrip
found 21 hours ago
Select American Airlines flight, departing Wed, Jul 29 from O'Hare Intl. to Lambert-St. Louis Intl., returning Tue, Aug 4, priced at $120 found 21 hours ago
United
Tue, Jul 28 - Wed, Jul 29
ORD
O'Hare Intl.
STL
Lambert-St. Louis Intl.
$120 Roundtrip, found 15 hours ago
$120
Roundtrip
found 15 hours ago
Select United flight, departing Tue, Jul 28 from O'Hare Intl. to Lambert-St. Louis Intl., returning Wed, Jul 29, priced at $120 found 15 hours ago
Bargain Flight
Wed, Sep 9 - Tue, Sep 15
AUS
Austin-Bergstrom Intl.
STL
Lambert-St. Louis Intl.
$216 Roundtrip, found 4 days ago
$216
Roundtrip
found 4 days ago
Select Bargain Flight flight, departing Wed, Sep 9 from Austin-Bergstrom Intl. to Lambert-St. Louis Intl., returning Tue, Sep 15, priced at $216 found 4 days ago
Frontier Airlines
Tue, Aug 11 - Tue, Aug 25
FLL
Fort Lauderdale - Hollywood Intl.
STL
Lambert-St. Louis Intl.
$222 Roundtrip, found 23 hours ago
$222
Roundtrip
found 23 hours ago
Select Frontier Airlines flight, departing Tue, Aug 11 from Fort Lauderdale - Hollywood Intl. to Lambert-St. Louis Intl., returning Tue, Aug 25, priced at $222 found 23 hours ago
Frontier Airlines
Wed, Aug 5 - Tue, Aug 18
DTW
Detroit Metropolitan Wayne County
STL
Lambert-St. Louis Intl.
$226 Roundtrip, found 2 days ago
$226
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Wed, Aug 5 from Detroit Metropolitan Wayne County to Lambert-St. Louis Intl., returning Tue, Aug 18, priced at $226 found 2 days ago
Delta
Wed, Oct 14 - Wed, Oct 14
DAL
Love Field
STL
Lambert-St. Louis Intl.
$257 Roundtrip, found 21 hours ago
$257
Roundtrip
found 21 hours ago
Select Delta flight, departing Wed, Oct 14 from Love Field to Lambert-St. Louis Intl., returning Wed, Oct 14, priced at $257 found 21 hours ago
Frontier Airlines
Thu, Sep 10 - Mon, Sep 14
RDU
Raleigh - Durham Intl.
STL
Lambert-St. Louis Intl.
$258 Roundtrip, found 9 hours ago
$258
Roundtrip
found 9 hours ago
Select Frontier Airlines flight, departing Thu, Sep 10 from Raleigh - Durham Intl. to Lambert-St. Louis Intl., returning Mon, Sep 14, priced at $258 found 9 hours ago
Frontier Airlines
Thu, Aug 13 - Tue, Aug 25
BOS
Logan Intl.
STL
Lambert-St. Louis Intl.
$268 Roundtrip, found 1 day ago
$268
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Thu, Aug 13 from Logan Intl. to Lambert-St. Louis Intl., returning Tue, Aug 25, priced at $268 found 1 day ago
Delta
Tue, Jul 21 - Wed, Jul 29
JAN
Evers Intl.
STL
Lambert-St. Louis Intl.
$279 Roundtrip, found 20 hours ago
$279
Roundtrip
found 20 hours ago
Select Delta flight, departing Tue, Jul 21 from Evers Intl. to Lambert-St. Louis Intl., returning Wed, Jul 29, priced at $279 found 20 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 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 15 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 $63, 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 $63 right now, why wait?

Union Flight Information
Destination airport
Lambert-St. Louis Intl.
Destination airport IATA code
STL
Roundtrip price
$62

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! (667 reviews)
"This is a quaint little place in Union, Mo. Just a short drive to downtown where there is an amazing diner and an awesome Distillery. We stayed there to attend Jass Fest in Augusta, MO."

Reviewed on Jun 18, 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! (1,667 reviews)
"No hotel only parking, must use public parking."

Reviewed on Jun 25, 2026

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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
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! (1,001 reviews)
"A little dated, but perfect for our family."

Reviewed on Jun 26, 2026

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Holiday Inn St. Louis West Six Flags by IHG
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 ...
7/10 Good! (1,000 reviews)
"Ac worked good. Liked having hard floors. Beds looked clean and felt nice. Loved the hot water in the shower. Shower and toilet were clean. There was a small crack in the bottom of the bath tub though. There was hair on the bathroom floor and the mirror were both dirty. The bath room sink ledge was ..."

Reviewed on Jun 22, 2026

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Super 8 by Wyndham Eureka/Six Flags Nearby
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! (1,001 reviews)
"We had a very late (1:30 AM) check-in. We were greeted at the door. When the front desk was checking us in, we mentioned we hadn't had dinner due to delayed flights. She came out with a bag of bagels, yogurt, muffins and water. It was beyond appreciated! The hotel layout was unique. The room was ..."

Reviewed on Jun 26, 2026

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Pinemark Inn & Suites
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! (945 reviews)
"Hotel was clean, as well as the room. Staff were very pleasant. Breakfast was good. All in all a very good place to stay, unlike other hotels that were not so good. Would stay there again if I'm ever in St. Louis."

Reviewed on Jun 27, 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. ...
8.6/10 Excellent! (890 reviews)
"Parking lot was a little rough on arriving , but after that it was a great experience ."

Reviewed on Jun 25, 2026

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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 ...
7.8/10 Good! (1,002 reviews)
"I had an extremely disappointing experience with this hotel. I booked a room online for my family, but when we arrived around 10:00 PM to check in, the staff refused to let us stay because they said I had too many children. If that was the hotel’s policy, it should have been made clear during the ..."

Reviewed on Jun 26, 2026

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Baymont by Wyndham Sullivan
See all 382 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.