How many flights depart from Chicago to Allentown on average per day?

As of September 2026, 7 flights take off from Chicago and land in Allentown each day. The most common flight departure time for this route is 1:00PM, with 61% of daily flights taking off in the afternoon.

How many flights depart from Chicago to Allentown on average per week?

As of September 2026, 53 flights take off from Chicago and land in Allentown each week. The most common flight departure day for this route is Mon, with 17% of weekly flights taking off on this day.

What is the cheapest airline that flies from Chicago to Allentown-Bethlehem?

Delta is the most popular carrier operating from Chicago to Allentown-Bethlehem

What airlines fly to Allentown?

United Airlines, American Airlines and Frontier are the top three most popular airlines that fly to Allentown from Chicago according to our data. United Airlines is the first choice among our users, with 59% of people opting to fly with this airline when traveling to Allentown. Keep in mind that there are 5 different airlines that fly to Allentown on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Chicago to Allentown-Bethlehem Airport?

Prices for flights from Chicago to Allentown-Bethlehem Airport are updated daily.

How many operators does momondo search for flights from Chicago to Allentown-Bethlehem Airport?

The number of operators available for flights from Chicago to Allentown-Bethlehem Airport is 2 as of September 2026.

How old do you have to be to fly from Chicago to Allentown-Bethlehem Airport?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Chicago to Allentown-Bethlehem Airport.

What documentation or ID do you need to fly to Allentown-Bethlehem Airport?

The necessary travel and health documents for your Allentown-Bethlehem Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$128 Cheap Flights from Chicago to Allentown in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Chicago to Allentown

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

8:00 am - 9:09 pmORD Chicago O'Hare Intl-ABE Allentown-Bethlehem

12h 09m1 stop Fort Lauderdale

4:36 pm - 12:51 pmABE Allentown-Bethlehem-ORD Chicago O'Hare Intl

21h 15m2 stops Orlando Atlanta Hartsfield-Jackson

$314Multiple Airlines

Thu, Nov 5 - Mon, Nov 9

7:45 pm - 10:56 pmORD Chicago O'Hare Intl-ABE Allentown-Bethlehem

2h 11mnonstop

5:42 am - 7:25 amABE Allentown-Bethlehem-ORD Chicago O'Hare Intl

2h 43mnonstop

$319American Airlines

Fri, Nov 20 - Sun, Nov 22

6:15 pm - 9:25 pmORD Chicago O'Hare Intl-ABE Allentown-Bethlehem

2h 10mnonstop

5:32 pm - 7:05 pmABE Allentown-Bethlehem-ORD Chicago O'Hare Intl

2h 33mnonstop

$319United Airlines

Sat, Dec 5 - Tue, Dec 8

6:25 am - 9:35 amORD Chicago O'Hare Intl-ABE Allentown-Bethlehem

2h 10mnonstop

5:43 pm - 7:05 pmABE Allentown-Bethlehem-ORD Chicago O'Hare Intl

2h 22mnonstop

$319United Airlines

Thu, Oct 15 - Sat, Oct 17

2:35 pm - 5:41 pmORD Chicago O'Hare Intl-ABE Allentown-Bethlehem

2h 06mnonstop

5:37 am - 7:15 amABE Allentown-Bethlehem-ORD Chicago O'Hare Intl

2h 38mnonstop

$319American Airlines

Thu, Dec 3 - Sun, Dec 6

7:45 pm - 10:56 pmORD Chicago O'Hare Intl-ABE Allentown-Bethlehem

2h 11mnonstop

6:54 am - 8:40 amABE Allentown-Bethlehem-ORD Chicago O'Hare Intl

2h 46mnonstop

$319American Airlines

Wed, Nov 25 - Fri, Nov 27

8:00 am - 9:09 pmORD Chicago O'Hare Intl-ABE Allentown-Bethlehem

12h 09m1 stop Fort Lauderdale

4:36 pm - 5:03 pmABE Allentown-Bethlehem-ORD Chicago O'Hare Intl

25h 27m1 stop Orlando

$325Multiple Airlines

Thu, Nov 5 - Mon, Nov 9

8:00 am - 9:09 pmORD Chicago O'Hare Intl-ABE Allentown-Bethlehem

12h 09m1 stop Fort Lauderdale

3:05 pm - 8:46 amABE Allentown-Bethlehem-ORD Chicago O'Hare Intl

18h 41m1 stop Orlando Sanford Intl

$328Multiple Airlines

Thu, Nov 5 - Sun, Nov 8

6:00 am - 12:06 pmMDW Chicago Midway-ABE Allentown-Bethlehem

5h 06m1 stop Atlanta Hartsfield-Jackson

6:39 am - 12:05 pmABE Allentown-Bethlehem-MDW Chicago Midway

6h 26m1 stop Atlanta Hartsfield-Jackson

$339Delta

Fri, Dec 11 - Sun, Dec 13

6:25 am - 9:37 amORD Chicago O'Hare Intl-ABE Allentown-Bethlehem

2h 12mnonstop

5:43 pm - 7:05 pmABE Allentown-Bethlehem-ORD Chicago O'Hare Intl

2h 22mnonstop

$339United Airlines

Sat, Oct 3 - Tue, Oct 6

Cheap last minute flights

Enter your travel dates to find the best prices.

4:30 pm - 10:16 pmMDW Chicago Midway-ABE Allentown-Bethlehem

4h 46m1 stop Atlanta Hartsfield-Jackson

6:04 pm - 10:44 pmABE Allentown-Bethlehem-MDW Chicago Midway

5h 40m1 stop Atlanta Hartsfield-Jackson

$435Delta

Sat, Sep 19 - Mon, Sep 21

9:59 am - 10:16 pmMDW Chicago Midway-ABE Allentown-Bethlehem

11h 17m2 stops Minneapolis St Paul Atlanta Hartsfield-Jackson

6:04 pm - 10:44 pmABE Allentown-Bethlehem-MDW Chicago Midway

5h 40m1 stop Atlanta Hartsfield-Jackson

$440Delta

Sat, Sep 19 - Mon, Sep 21

7:00 pm - 10:18 pmORD Chicago O'Hare Intl-ABE Allentown-Bethlehem

2h 18mnonstop

9:13 am - 10:38 amABE Allentown-Bethlehem-ORD Chicago O'Hare Intl

2h 25mnonstop

$471American Airlines

Fri, Sep 18 - Mon, Sep 21

7:00 pm - 10:18 pmORD Chicago O'Hare Intl-ABE Allentown-Bethlehem

2h 18mnonstop

9:13 am - 10:38 amABE Allentown-Bethlehem-ORD Chicago O'Hare Intl

2h 25mnonstop

$513American Airlines

Fri, Sep 18 - Mon, Sep 21

1:28 pm - 4:40 pmORD Chicago O'Hare Intl-ABE Allentown-Bethlehem

2h 12mnonstop

9:13 am - 10:38 amABE Allentown-Bethlehem-ORD Chicago O'Hare Intl

2h 25mnonstop

$513American Airlines

Fri, Sep 18 - Mon, Sep 21

7:00 pm - 10:18 pmORD Chicago O'Hare Intl-ABE Allentown-Bethlehem

2h 18mnonstop

2:25 pm - 7:38 pmABE Allentown-Bethlehem-ORD Chicago O'Hare Intl

6h 13m1 stop Charlotte Douglas

$540American Airlines

Fri, Sep 18 - Mon, Sep 21

7:00 pm - 10:18 pmORD Chicago O'Hare Intl-ABE Allentown-Bethlehem

2h 18mnonstop

2:25 pm - 7:38 pmABE Allentown-Bethlehem-ORD Chicago O'Hare Intl

6h 13m1 stop Charlotte Douglas

$559American Airlines

Fri, Sep 18 - Mon, Sep 21

5:20 am - 12:25 pmORD Chicago O'Hare Intl-ABE Allentown-Bethlehem

6h 05m1 stop Charlotte Douglas

5:10 pm - 6:48 pmABE Allentown-Bethlehem-ORD Chicago O'Hare Intl

2h 38mnonstop

$584American Airlines

Fri, Sep 18 - Mon, Sep 21

11:29 am - 5:19 pmORD Chicago O'Hare Intl-ABE Allentown-Bethlehem

4h 50m1 stop Atlanta Hartsfield-Jackson

6:04 pm - 11:59 pmABE Allentown-Bethlehem-ORD Chicago O'Hare Intl

6h 55m1 stop Atlanta Hartsfield-Jackson

$656Delta

Fri, Sep 18 - Mon, Sep 21

11:17 am - 10:16 pmORD Chicago O'Hare Intl-ABE Allentown-Bethlehem

9h 59m2 stops Detroit Metropolitan Wayne County Atlanta Hartsfield-Jackson

6:04 pm - 11:59 pmABE Allentown-Bethlehem-ORD Chicago O'Hare Intl

6h 55m1 stop Atlanta Hartsfield-Jackson

$661Delta

Fri, Sep 18 - Mon, Sep 21

Cheap direct flights

Enter your travel dates to find the best prices.

6:15 pm - 9:25 pmORD Chicago O'Hare Intl-ABE Allentown-Bethlehem

2h 10mnonstop

5:32 pm - 7:05 pmABE Allentown-Bethlehem-ORD Chicago O'Hare Intl

2h 33mnonstop

$319United Airlines

Sat, Dec 5 - Tue, Dec 8

6:25 am - 9:35 amORD Chicago O'Hare Intl-ABE Allentown-Bethlehem

2h 10mnonstop

5:43 pm - 7:05 pmABE Allentown-Bethlehem-ORD Chicago O'Hare Intl

2h 22mnonstop

$319United Airlines

Thu, Oct 15 - Sat, Oct 17

7:45 pm - 10:56 pmORD Chicago O'Hare Intl-ABE Allentown-Bethlehem

2h 11mnonstop

5:42 am - 7:25 amABE Allentown-Bethlehem-ORD Chicago O'Hare Intl

2h 43mnonstop

$319American Airlines

Fri, Nov 20 - Sun, Nov 22

2:35 pm - 5:41 pmORD Chicago O'Hare Intl-ABE Allentown-Bethlehem

2h 06mnonstop

5:37 am - 7:15 amABE Allentown-Bethlehem-ORD Chicago O'Hare Intl

2h 38mnonstop

$319American Airlines

Thu, Dec 3 - Sun, Dec 6

7:45 pm - 10:56 pmORD Chicago O'Hare Intl-ABE Allentown-Bethlehem

2h 11mnonstop

6:54 am - 8:40 amABE Allentown-Bethlehem-ORD Chicago O'Hare Intl

2h 46mnonstop

$319American Airlines

Wed, Nov 25 - Fri, Nov 27

2:35 pm - 5:41 pmORD Chicago O'Hare Intl-ABE Allentown-Bethlehem

2h 06mnonstop

5:37 am - 7:15 amABE Allentown-Bethlehem-ORD Chicago O'Hare Intl

2h 38mnonstop

$319American Airlines

Fri, Nov 13 - Sun, Nov 15

6:59 pm - 10:12 pmORD Chicago O'Hare Intl-ABE Allentown-Bethlehem

2h 13mnonstop

6:44 pm - 8:23 pmABE Allentown-Bethlehem-ORD Chicago O'Hare Intl

2h 39mnonstop

$319American Airlines

Thu, Oct 8 - Mon, Oct 12

3:00 pm - 6:14 pmORD Chicago O'Hare Intl-ABE Allentown-Bethlehem

2h 14mnonstop

6:47 pm - 8:26 pmABE Allentown-Bethlehem-ORD Chicago O'Hare Intl

2h 39mnonstop

$319American Airlines

Thu, Oct 22 - Thu, Oct 29

7:49 pm - 10:59 pmORD Chicago O'Hare Intl-ABE Allentown-Bethlehem

2h 10mnonstop

5:37 am - 7:15 amABE Allentown-Bethlehem-ORD Chicago O'Hare Intl

2h 38mnonstop

$319American Airlines

Wed, Nov 4 - Sun, Nov 8

7:49 pm - 10:59 pmORD Chicago O'Hare Intl-ABE Allentown-Bethlehem

2h 10mnonstop

5:37 am - 7:15 amABE Allentown-Bethlehem-ORD Chicago O'Hare Intl

2h 38mnonstop

$319American Airlines

Thu, Nov 5 - Sun, Nov 8

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American Airlines flights from Chicago to Allentown

Our best American Airlines deals on Chicago to Allentown flight tickets

American Airlines

Dec 23

ORD8:40 pmChicago O'Hare Intl

2h 12m

ABE11:52 pmAllentown-Bethlehem

Dec 29

ABE7:10 amAllentown-Bethlehem

2h 45m

ORD8:55 amChicago O'Hare Intl

$328

American Airlines

Dec 23

ORD8:40 pmChicago O'Hare Intl

2h 12m

ABE11:52 pmAllentown-Bethlehem

Dec 29

ABE7:10 amAllentown-Bethlehem

2h 45m

ORD8:55 amChicago O'Hare Intl

$360

American Airlines

Oct 1

ORD1:28 pmChicago O'Hare Intl

2h 12m

ABE4:40 pmAllentown-Bethlehem

Oct 5

ABE6:44 pmAllentown-Bethlehem

2h 39m

ORD8:23 pmChicago O'Hare Intl

$369

Delta flights from Chicago to Allentown

Our best Delta deals on Chicago to Allentown flight tickets

Delta

Dec 11

MDW6:00 amChicago Midway

5h 06m

1 stop

ABE12:06 pmAllentown-Bethlehem

Dec 13

ABE6:39 amAllentown-Bethlehem

6h 26m

1 stop

MDW12:05 pmChicago Midway

$339

Delta

Dec 5

ORD10:32 amChicago O'Hare Intl

5h 51m

1 stop

ABE5:23 pmAllentown-Bethlehem

Dec 8

ABE6:39 amAllentown-Bethlehem

9h 14m

2 stops

ORD2:53 pmChicago O'Hare Intl

$344

Delta

Nov 4

ORD10:55 amChicago O'Hare Intl

10h 24m

2 stops

ABE10:19 pmAllentown-Bethlehem

Nov 7

ABE1:00 pmAllentown-Bethlehem

8h 30m

2 stops

ORD8:30 pmChicago O'Hare Intl

$349

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoAllentown

ORD Chicago O'Hare Intl - ABE Allentown-Bethlehem

ORDABE

Chicago O'Hare Intl

Thu 11/5

8:00 am-9:09 pm

1 stop12h 09m

Allentown-Bethlehem

Mon 11/9

4:36 pm-12:51 pm

2 stops21h 15m

$314

ChicagoAllentown

ORD Chicago O'Hare Intl - ABE Allentown-Bethlehem

ORDABE

Chicago O'Hare Intl

Fri 11/20

7:45 pm-10:56 pm

Nonstop2h 11m

Allentown-Bethlehem

Sun 11/22

5:42 am-7:25 am

Nonstop2h 43m

$319

ChicagoAllentown

ORD Chicago O'Hare Intl - ABE Allentown-Bethlehem

ORDABE

Chicago O'Hare Intl

Sat 12/5

6:15 pm-9:25 pm

Nonstop2h 10m

Allentown-Bethlehem

Tue 12/8

5:32 pm-7:05 pm

Nonstop2h 33m

$319

Quickest round-trip

ChicagoAllentown

ORD Chicago O'Hare Intl - ABE Allentown-Bethlehem

ORDABE

Chicago O'Hare Intl

Thu 10/15

6:25 am-9:35 am

Nonstop2h 10m

Allentown-Bethlehem

Sat 10/17

5:43 pm-7:05 pm

Nonstop2h 22m

$319

ChicagoAllentown

ORD Chicago O'Hare Intl - ABE Allentown-Bethlehem

ORDABE

Chicago O'Hare Intl

Thu 12/3

2:35 pm-5:41 pm

Nonstop2h 06m

Allentown-Bethlehem

Sun 12/6

5:37 am-7:15 am

Nonstop2h 38m

$319

ChicagoAllentown

ORD Chicago O'Hare Intl - ABE Allentown-Bethlehem

ORDABE

Chicago O'Hare Intl

Wed 11/25

7:45 pm-10:56 pm

Nonstop2h 11m

Allentown-Bethlehem

Fri 11/27

6:54 am-8:40 am

Nonstop2h 46m

$319

ChicagoAllentown

ORD Chicago O'Hare Intl - ABE Allentown-Bethlehem

ORDABE

Chicago O'Hare Intl

Thu 11/5

8:00 am-9:09 pm

1 stop12h 09m

Allentown-Bethlehem

Mon 11/9

4:36 pm-5:03 pm

1 stop25h 27m

$325

ChicagoAllentown

ORD Chicago O'Hare Intl - ABE Allentown-Bethlehem

ORDABE

Chicago O'Hare Intl

Thu 11/5

8:00 am-9:09 pm

1 stop12h 09m

Allentown-Bethlehem

Sun 11/8

3:05 pm-8:46 am

1 stop18h 41m

$328

ChicagoAllentown

MDW Chicago Midway - ABE Allentown-Bethlehem

MDWABE

Chicago Midway

Fri 12/11

6:00 am-12:06 pm

1 stop5h 06m

Allentown-Bethlehem

Sun 12/13

6:39 am-12:05 pm

1 stop6h 26m

$339

ChicagoAllentown

ORD Chicago O'Hare Intl - ABE Allentown-Bethlehem

ORDABE

Chicago O'Hare Intl

Sat 10/3

6:25 am-9:37 am

Nonstop2h 12m

Allentown-Bethlehem

Tue 10/6

5:43 pm-7:05 pm

Nonstop2h 22m

$339

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Chicago to Allentown

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the typical price of a round-trip flight between Chicago and Allentown?

Prices are currently low for flights on this route.

Typical prices usually range from $319 to $379.
The lowest price recently found on this route was $314.

What is the cheapest month to fly to Allentown?

The month of February is, on average, the cheapest month to fly to Allentown from Chicago, with most prices found around $252. If you aren’t able to travel to Allentown during the month of February, then flying in October is also cheap. Prices for this month can be found on momondo for an average of $299.

What is the cheapest day to depart on your flight to Allentown?

The cheapest day to depart from Chicago to Allentown is on a Saturday when prices can be found for as low as $298. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to Allentown on Sunday is $439.

What is the cheapest time of day to depart on your flight to Allentown?

At noon is the cheapest time of day to fly from Chicago to Allentown when you can find flight prices for as low as $320. Flying to Allentown at noon is an ideal time because this is during off-peak travel hours. Flights in the afternoon are often more expensive with an average ticket price of $547.

What is the cheapest Chicago to Allentown-Bethlehem flight route?

Fly from Chicago O'Hare Intl to Allentown-Bethlehem for the best Chicago - Allentown-Bethlehem flight prices

What cabin class options are available on Chicago to Allentown flights?

There are 3 cabin classes available to choose from on Chicago to Allentown flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Chicago to Allentown flights?

No. A direct flight is the cheapest option for a flight between Chicago to Allentown.

How have Chicago to Allentown flight prices changed over time?

When to book flights from Chicago to Allentown

Are you open to changing your travel dates? Check out the ideal times to fly from Chicago to Allentown according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Chicago to Allentown (CHI to ABE) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Chicago to Allentown

Best Price Found	$128
Fastest flight time	1h 55m
Direct flights	Every day
Airports in Allentown	1 airport

The best one-way flight to Allentown from Chicago in the past 72 hours is $128. The best round-trip flight deal from Chicago to Allentown found on momondo in the last 72 hours is $314.

The fastest flight from Chicago to Allentown takes 1h 55m

Direct flights go from Chicago to Allentown every day.

There is 1 airport in Allentown. From Chicago there are direct flights to Allentown-Bethlehem (ABE).

Search flight deals

Frequently asked questions about flying from Chicago to Allentown

How far is Chicago to Allentown-Bethlehem by plane?
The distance between Chicago and Allentown-Bethlehem is about 636.8 mi. Flights usually cover this in 1h 55m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from Chicago to Allentown-Bethlehem Airport?
Prices for flights from Chicago to Allentown-Bethlehem Airport are updated daily.
How many operators does momondo search for flights from Chicago to Allentown-Bethlehem Airport?
The number of operators available for flights from Chicago to Allentown-Bethlehem Airport is 2 as of September 2026.
How old do you have to be to fly from Chicago to Allentown-Bethlehem Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Chicago to Allentown-Bethlehem Airport.
What documentation or ID do you need to fly to Allentown-Bethlehem Airport?
The necessary travel and health documents for your Allentown-Bethlehem Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Chicago to Allentown?
Based on momondo bookings for flights between Chicago and Allentown, the leading plane model is Embraer 170, making up 28.36% of the total bookings. Other popular models include Canadair (Bombardier) Regional Jet CRJ-550 with 27.61%, Canadair (Bombardier) Regional Jet with 13.81%, and Airbus A321neo with 7.46%.
What is the most popular airline from Chicago to Allentown?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Chicago to Allentown is United Airlines (67% of total bookings). The next most popular airline is American Airlines (33%).

Best airlines flying from Chicago to Allentown

Compare and see reviews for airlines that fly from Chicago to Allentown with momondo

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $225	Free Cancellation	Rating 7.4 10,214 reviews		Search United Airlines flights
American Airlines	PriceFrom $269	Free Cancellation	Rating 7.1 12,075 reviews		Search American Airlines flights

United Airlines Flights From Chicago to Allentown
The lowest priced United Airlines flight from Chicago to Allentown from the last 72 hours was $225. Generally, United Airlines has 19 flights on this route every week with an average price of $372. United Airlines is rated 7.4/10 by our users.
American Airlines Flights From Chicago to Allentown
The best American Airlines deal for Chicago to Allentown flight tickets found on momondo in the last 72 hours was $269, round-trip. It should be noted that an average American Airlines flight deal for this route in this time was higher, at $319 round-trip. American Airlines operates 11 flights out of Chicago into Allentown in an average week, so prices vary by time and availability. 12,075 American Airlines reviews by users on momondo have scored the airline at 7.1/10.

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Why use momondo?

Why should I use momondo to find a flight deal from Chicago to Allentown?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Allentown from Chicago.

Can I find flights from Chicago to Allentown with flexible booking policies on momondo?

Flights from Chicago to Allentown with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Chicago to Allentown?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Chicago to Allentown.

I’m not ready to book a flight from Chicago to Allentown right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Chicago to Allentown flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.