Search Cheap Flights to
Waterloo

Search 400 airlines and 321,000 hotels worldwide.

Stop Planning & Start Exploring

FREE 24 hour cancellation on most flights

Waterloo Flights as Low as $88

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

Frontier Airlines
Wed, Apr 29 - Sat, May 9
ATL
Hartsfield-Jackson Atlanta Intl.
STL
Lambert-St. Louis Intl.
$88 Roundtrip, found 2 hours ago
$88
Roundtrip
found 2 hours ago
Select Frontier Airlines flight, departing Wed, Apr 29 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Sat, May 9, priced at $88 found 2 hours ago
Frontier Airlines
Sat, Apr 4 - Sat, Apr 25
DEN
Denver Intl.
STL
Lambert-St. Louis Intl.
$102 Roundtrip, found 2 hours ago
$102
Roundtrip
found 2 hours ago
Select Frontier Airlines flight, departing Sat, Apr 4 from Denver Intl. to Lambert-St. Louis Intl., returning Sat, Apr 25, priced at $102 found 2 hours ago
Frontier Airlines
Wed, May 13 - Tue, Jun 2
ATL
Hartsfield-Jackson Atlanta Intl.
STL
Lambert-St. Louis Intl.
$116 Roundtrip, just found
$116
Roundtrip
just found
Select Frontier Airlines flight, departing Wed, May 13 from Hartsfield-Jackson Atlanta Intl. to Lambert-St. Louis Intl., returning Tue, Jun 2, priced at $116 just found
Frontier Airlines
Mon, Apr 13 - Mon, May 4
DEN
Denver Intl.
STL
Lambert-St. Louis Intl.
$118 Roundtrip, found 20 hours ago
$118
Roundtrip
found 20 hours ago
Select Frontier Airlines flight, departing Mon, Apr 13 from Denver Intl. to Lambert-St. Louis Intl., returning Mon, May 4, priced at $118 found 20 hours ago
Frontier Airlines
Fri, Apr 17 - Mon, May 4
DFW
Dallas-Fort Worth Intl.
STL
Lambert-St. Louis Intl.
$173 Roundtrip, found 2 hours ago
$173
Roundtrip
found 2 hours ago
Select Frontier Airlines flight, departing Fri, Apr 17 from Dallas-Fort Worth Intl. to Lambert-St. Louis Intl., returning Mon, May 4, priced at $173 found 2 hours ago
Frontier Airlines
Tue, Apr 14 - Thu, Apr 23
LGA
LaGuardia
STL
Lambert-St. Louis Intl.
$184 Roundtrip, found 1 hour ago
$184
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Tue, Apr 14 from LaGuardia to Lambert-St. Louis Intl., returning Thu, Apr 23, priced at $184 found 1 hour ago
Frontier Airlines
Sun, Apr 12 - Mon, Apr 27
TTN
Mercer
STL
Lambert-St. Louis Intl.
$184 Roundtrip, found 2 hours ago
$184
Roundtrip
found 2 hours ago
Select Frontier Airlines flight, departing Sun, Apr 12 from Mercer to Lambert-St. Louis Intl., returning Mon, Apr 27, priced at $184 found 2 hours ago
Frontier Airlines
Thu, Apr 9 - Mon, Apr 13
PHL
Philadelphia Intl.
STL
Lambert-St. Louis Intl.
$184 Roundtrip, found 2 hours ago
$184
Roundtrip
found 2 hours ago
Select Frontier Airlines flight, departing Thu, Apr 9 from Philadelphia Intl. to Lambert-St. Louis Intl., returning Mon, Apr 13, priced at $184 found 2 hours ago
Frontier Airlines
Thu, Apr 9 - Wed, Apr 15
DTW
Detroit Metropolitan Wayne County
STL
Lambert-St. Louis Intl.
$184 Roundtrip, found 2 hours ago
$184
Roundtrip
found 2 hours ago
Select Frontier Airlines flight, departing Thu, Apr 9 from Detroit Metropolitan Wayne County to Lambert-St. Louis Intl., returning Wed, Apr 15, priced at $184 found 2 hours ago
American Airlines
Mon, May 11 - Mon, May 18
ORD
O'Hare Intl.
STL
Lambert-St. Louis Intl.
$191 Roundtrip, found 2 hours ago
$191
Roundtrip
found 2 hours ago
Select American Airlines flight, departing Mon, May 11 from O'Hare Intl. to Lambert-St. Louis Intl., returning Mon, May 18, priced at $191 found 2 hours ago
Bargain Flight
Sat, Apr 11 - Tue, Apr 14
DTW
Detroit Metropolitan Wayne County
STL
Lambert-St. Louis Intl.
$199 Roundtrip, found 2 hours ago
$199
Roundtrip
found 2 hours ago
Select Bargain Flight flight, departing Sat, Apr 11 from Detroit Metropolitan Wayne County to Lambert-St. Louis Intl., returning Tue, Apr 14, priced at $199 found 2 hours ago
Bargain Flight
Tue, Apr 21 - Tue, Apr 28
MSP
Minneapolis - St. Paul Intl.
STL
Lambert-St. Louis Intl.
$204 Roundtrip, just found
$204
Roundtrip
just found
Select Bargain Flight flight, departing Tue, Apr 21 from Minneapolis - St. Paul Intl. to Lambert-St. Louis Intl., returning Tue, Apr 28, priced at $204 just found
Frontier Airlines
Thu, Apr 9 - Mon, Apr 27
SFO
San Francisco Intl.
STL
Lambert-St. Louis Intl.
$210 Roundtrip, found 2 hours ago
$210
Roundtrip
found 2 hours ago
Select Frontier Airlines flight, departing Thu, Apr 9 from San Francisco Intl. to Lambert-St. Louis Intl., returning Mon, Apr 27, priced at $210 found 2 hours ago
Delta
Wed, Apr 29 - Tue, May 5
MSP
Minneapolis - St. Paul Intl.
STL
Lambert-St. Louis Intl.
$211 Roundtrip, found 2 hours ago
$211
Roundtrip
found 2 hours ago
Select Delta flight, departing Wed, Apr 29 from Minneapolis - St. Paul Intl. to Lambert-St. Louis Intl., returning Tue, May 5, priced at $211 found 2 hours ago
Delta
Tue, Apr 28 - Tue, May 12
DAL
Love Field
STL
Lambert-St. Louis Intl.
$305 Roundtrip, found 2 hours ago
$305
Roundtrip
found 2 hours ago
Select Delta flight, departing Tue, Apr 28 from Love Field to Lambert-St. Louis Intl., returning Tue, May 12, priced at $305 found 2 hours ago
Alaska Airlines
Tue, Apr 7 - Tue, Apr 21
SFO
San Francisco Intl.
STL
Lambert-St. Louis Intl.
$343 Roundtrip, found 2 hours ago
$343
Roundtrip
found 2 hours ago
Select Alaska Airlines flight, departing Tue, Apr 7 from San Francisco Intl. to Lambert-St. Louis Intl., returning Tue, Apr 21, priced at $343 found 2 hours ago

Cheap Flights to Waterloo

Fall in love at first flight with your vacation to Waterloo 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 Waterloo on Hotwire, and you’ll be up, up, and on a getaway in no time.

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

Frequently Asked Questions About flights to Waterloo

Don’t waste your time on endless searches for cheap airline tickets oneway or roundtrip. We’ll have you on your way to Waterloo 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 Waterloo?

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 Waterloo are in April, but when you book your flight on Hotwire, savings are always in season.

How many airlines fly to Waterloo?

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 Waterloo.

What airport is best to fly into Waterloo?

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

How much are flights to Waterloo?

Got very cheap flights on your vacation itinerary? When you book your airline tickets to Waterloo on Hotwire, you may just get what’s on your getaway wish list. With tickets as low as $88, 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 Waterloo?

The trick to saving a stack of cash on your flight to Waterloo? 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 $88 right now, why wait?

Waterloo Flight Information
Destination airport
Lambert-St. Louis Intl.
Destination airport IATA code
STL
Roundtrip price
$88

Last Minute Hotel Deals in Waterloo

Pear Tree Inn St. Louis Near Union Station

Pear Tree Inn St. Louis Near Union Station

3 out of 5
2211 Market Street St. Louis MO
Book a stay at this business-friendly hotel in St. Louis. Enjoy free breakfast, free WiFi, and free parking. Our guests praise the breakfast and the restaurant ...
8.8/10 Excellent! (1,871 reviews)
This was a wonderful hotel to stay at while we explored the National Parks. We enjoyed the free evening snacks and drinks after a full day at Gateway Arch. Staff were very friendly. The pool was nice. Rooms very clean. Would definitely stop here again.

Reviewed on Mar 14, 2026

Get rates
Pear Tree Inn St. Louis Near Union Station
Drury Plaza Hotel St. Louis at the Arch

Drury Plaza Hotel St. Louis at the Arch

3 out of 5
2 South 4th Street St. Louis MO
Book a stay at this business-friendly hotel in St. Louis. Enjoy free breakfast, free WiFi, and 2 hot tubs. Our guests praise the breakfast and the pool in our ...
9.4/10 Exceptional! (3,354 reviews)
Wi-fi was great, location was great and staff were really nice!

Reviewed on Mar 15, 2026

Get rates
Drury Plaza Hotel St. Louis at the Arch
21C Museum Hotel St Louis

21C Museum Hotel St Louis

4.5 out of 5
1528 Locust street St. Louis MO
Book a stay at this luxury hotel in St. Louis. Enjoy free WiFi, breakfast (surcharge), and room service. Our guests praise the pool and the restaurant in our ...
9/10 Wonderful! (1,667 reviews)
From the time we arrived, we loved the vibe of 21C! Our stay exceeded or expectations! Upon visiting the area again, we will stay at 21C. Convenient to downtown venues and eateries, walkable to different exhibit a museums.

Reviewed on Mar 16, 2026

Get rates
21C Museum Hotel St Louis
Hyatt Regency St. Louis at The Arch

Hyatt Regency St. Louis at The Arch

4 out of 5
315 Chestnut St St. Louis MO
Book a stay at this business-friendly hotel in St. Louis. Enjoy free WiFi, 3 restaurants, and 2 bars/lounges. Our guests praise the helpful staff and the clean ...
8.4/10 Very Good! (3,994 reviews)
The beds are incredibly uncomfortable unless being comfortable means sleeping on plywood for you. Pillows are not great either.

Reviewed on Mar 15, 2026

Get rates
Hyatt Regency St. Louis at The Arch
River City Casino & Hotel

River City Casino & Hotel

4 out of 5
777 River City Casino Blvd St. Louis MO
Book a stay at this business-friendly hotel in St. Louis. Enjoy free parking, 5 restaurants, and a casino. Our guests praise the helpful staff and the clean ...
9/10 Wonderful! (1,494 reviews)
Room was okay, definitely out dated. There was hair inside the bathtub wall. Possible from previous occupant.

Reviewed on Mar 15, 2026

Get rates
River City Casino & Hotel
Drury Inn & Suites St. Louis Union Station

Drury Inn & Suites St. Louis Union Station

3 out of 5
201 S 20th St St. Louis MO
Book a stay at this business-friendly hotel in St. Louis. Enjoy free breakfast, free WiFi, and a fitness center. Our guests praise the breakfast and the helpful ...
9.4/10 Exceptional! (1,347 reviews)
We had to pay for parking. Great location if you like the downtown feel. Not the best for us. Will go back to staying at Hiltons for this price.

Reviewed on Mar 15, 2026

Get rates
Drury Inn & Suites St. Louis Union Station
Best Western St. Louis-Kirkwood Route 66

Best Western St. Louis-Kirkwood Route 66

3.5 out of 5
1200 S Kirkwood Road Kirkwood MO
Book a stay at this business-friendly hotel in Kirkwood. Enjoy free parking, an outdoor pool, and room service. Our guests praise the breakfast and the helpful ...
8.4/10 Very Good! (1,434 reviews)
Excellent place!

Reviewed on Mar 11, 2026

Get rates
Best Western St. Louis-Kirkwood Route 66
Live by Loews - St.Louis

Live by Loews - St.Louis

4 out of 5
799 Clark ave St. Louis MO
Book a stay at this business-friendly hotel in St. Louis. Enjoy free WiFi, a rooftop terrace, and breakfast (surcharge). Our guests praise the bar and the helpful ...
9.4/10 Exceptional! (1,125 reviews)
Always a great stay

Reviewed on Mar 16, 2026

Get rates
Live by Loews - St.Louis
See all 1,187 properties in Waterloo
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.