Update: Some offers mentioned below are no longer available. View the current offers here.Last week, more than 2,400 flights were cancelled due to a powerful winter storm. And now, another storm is developing, threatening to wreak havoc on air travel this weekend. Airlines are releasing weather waivers so flexible travelers can re-book their flights to avoid the storm.Chicago residents woke up to record low temperatures Saturday morning, with parts as cold as -23°F. So far, the severe weather has mostly consisted of brutal cold. However, on Sunday evening, the weather is going to take a turn for the worse as a new winter storm begins to blow through:After passing through the Great Lakes region, the storm is expected to sweep eastward and drop up to 18 inches of snow in parts of the Northeast:Image generated by Weather Underground.Flight schedules haven’t been impacted much as of Sunday morning. However, most US airlines have already issued weather waivers. American Airlines, Southwest and United each have major operations at one of Chicago’s two airports, and each of these airlines has issued a waiver for these airports.As of 12:00pm ET Sunday, airlines have issued waivers for a combined 77 airports:Here are the weather waivers issued so far:American AirlinesChicagoTravel dates: January 27-28Airports covered: Chicago O’Hare (ORD)Must have purchased your ticket by January 25Rebook travel anytime between January 25 - February 1You can’t change your origin or destination city. Must rebook in same cabin or pay the difference.Avoid the phone queue. Changes available on both AA’s website and in the AA app.Upper Midwest USSign up for our daily newsletterEmail addressSign upI would like to subscribe to The Points Guy newsletters and special email promotions. The Points Guy will not share or sell your email. See privacy policy.Travel dates: January 27-28Airports covered: Appleton, Wisconsin (ATW); Fargo, North Dakota (FAR); Green Bay, Wisconsin (GRB); La Crosse, Wisconsin (LSE); Madison, Wisconsin (MSN); Milwaukee, Wisconsin (MKE); Minneapolis / St. Paul, Minnesota (MSP); Rochester, Minnesota (RST); Wausau, Wisconsin (CWA)Must have purchased your ticket by January 26Rebook travel anytime between January 26 - February 1You can’t change your origin or destination city. Must rebook in same cabin or pay the difference.Avoid the phone queue. Changes available on both AA’s website and in the AA app.DeltaChicago Winter WeatherTravel dates: January 28Airports covered: Chicago Midway, IL (MDW) and Chicago O’Hare (ORD)Ticket must be reissued by: February 1Rebooked travel must begin no later than: February 1Must have purchased your ticket by: January 27Changes to origins and destinations may result in an increase in fare. Any difference in fare between your original ticket and the new ticket will be collected at the time of booking.When rescheduled travel occurs beyond February 1, the change fee will be waived. However, a difference in fare may apply.Upper Midwest Winter WeatherTravel dates: January 27-28Airports covered: Appleton, WI (ATW); Bemidji, MN (BJI); Brainerd, MN (BRD); Duluth, MN (DLH); Fargo, ND (FAR); Grand Forks, ND (GFK); Green Bay, WI (GRB); Hibbing, MN (HIB); Iron Mountain, MI (IMT); La Crosse, WI (LSE); Madison, WI (MSN); Milwaukee, WI (MKE); Minneapolis-St. Paul, MN (MSP); Rhinelander, WI (RHI); Rochester, MN (RST); Wausau, WI (CWA)Ticket must be reissued by: February 1Rebooked travel must begin no later than: February 1Must have purchased your ticket by: January 26Changes to origins and destinations may result in an increase in fare. Any difference in fare between your original ticket and the new ticket will be collected at the time of booking.When rescheduled travel occurs beyond February 1, the change fee will be waived. However, a difference in fare may apply.FrontierJayden 1Travel dates: January 27-29Airports covered: Chicago O’Hare, IL (ORD)Must have purchased ticket by: January 26Rebooked travel must be completed by: February 13Customers may make one itinerary change – rules/restrictions regarding standard change fees, advance purchase, day or time applications, blackouts, and minimum or maximum stay requirements will be waived.Jayden 2Travel dates: January 27-28Airports covered: Cedar Rapids, IA (CID); Des Moines, IA (DSM); Fargo, ND (FAR); Minneapolis/St. Paul, MN (MSP); Sioux Falls, SD (FSD)Must have purchased ticket by: January 26Rebooked travel must be completed by: February 13Customers may make one itinerary change – rules/restrictions regarding standard change fees, advance purchase, day or time applications, blackouts, and minimum or maximum stay requirements will be waived.Jayden 3Travel dates: January 28Airports covered: Buffalo, NY (BUF); Cleveland, OH (CLE); Columbus, OH (CMH); Detroit, MI (DTW); Grand Rapids, MI (GRR); Green Bay, WI (GRB); Madison, WI (MSN); Milwaukee, WI (MKE); Pittsburgh, PA (PIT); Syracuse, NY (SYR)Must have purchased ticket by: January 26Rebooked travel must be completed by: February 13Customers may make one itinerary change – rules/restrictions regarding standard change fees, advance purchase, day or time applications, blackouts, and minimum or maximum stay requirements will be waived.JetBlueTravel dates: January 27-28Airports covered: Chicago, IL (ORD) and Minneapolis-Saint Paul, MN (MSP)Customers may rebook their flights for travel through Wednesday, January 30Original travel must have been booked on or before Saturday, January 26SouthwestTravel dates: January 27-28Airports covered: Buffalo/Niagara Falls (BUF), Chicago Midway (MDW), Des Moines (DSM), Detroit (DTW), Grand Rapids (GRR), Milwaukee (MKE), Minneapolis/St. Paul (MSP), Rochester (ROC)Customers who are holding reservations to/from/through the cities above on the corresponding dates may rebook in the original class of service or travel standby (within 14 days of their original date of travel between the original city-pairs and in accordance with [Southwest’s] accommodation procedures) without paying any additional charge.SpiritTravel dates: January 27-28Airports covered: Chicago, IL (ORD) and Detroit, MI (DTW)Modification Charge/Fare Difference waived through January 31After this date, the modification charge is waived, but a fare difference may applySun CountryTravel dates: January 27-28Airports covered: Minneapolis/St. Paul (MSP) and Madison, WI (MSN)Travel must have been booked by: January 27New travel commences on or before Saturday February 2Space must be available within the same cabin as the original ticket.UnitedNorthern Plains Winter WeatherTravel Dates: January 27-28Airports covered: Billings, MT (BIL); Bismarck, ND (BIS); Bozeman, MT (BZN); Cedar Rapids, IA (CID); Des Moines, IA (DSM); Devils Lake, ND (DVL); Dickinson, ND (DIK); Duluth, MN (DLH); Fargo, ND (FAR); Great Falls, MT (GTF); Helena, MT (HLN); Jamestown, ND (JMS); Minneapolis/St. Paul, MN (MSP); Minot, ND (MOT); Rapid City, SD (RAP); Sioux Falls, SD (FSD); Williston, ND (ISN)The change fee and any difference in fare will be waived for new United flights departing on or before ​​February 1, as long as travel is rescheduled in the originally ticketed cabin (any fare class) and between the same cities as originally ticketed.​​Chicago Winter WeatherTravel Dates: January 27 - February 1Airports covered: Chicago-O’Hare, IL (ORD)​The change fee and any difference in fare will be waived for new United flights departing on or before ​​February 4, as long as travel is rescheduled in the originally ticketed cabin (any fare class) and between the same cities as originally ticketed.​​Great Lakes and Ohio Valley Winter WeatherTravel Dates: January 28Airports covered: Akron/Canton, OH (CAK); Appleton, WI (ATW); Buffalo, NY (BUF)​; Cleveland, OH (CLE); Detroit, MI (DTW); Eau Claire, WI (EAU); Erie, PA (ERI); Flint, MI (FNT); Fort Wayne, IN (FWA); Grand Rapids, MI (GRR); Green Bay, WI (GRB); Hancock, MI (CMX); Kalamazoo, MI (AZO); Lansing, MI (LAN); London, ON, CA (YXU); Madison, WI (MSN); Milwaukee, WI (MKE); Moline, IL (MLI); Muskegon, MI (MKG); Ottawa, ON, CA (YOW); Peoria, IL (PIA); Rochester, MN (RST); Saginaw, MI (MBS); South Bend, IN (SBN); Toronto, ON, CA (YYZ); Traverse City, MI (TVC); Wausau, WI (CWA)The change fee and any difference in fare will be waived for new United flights departing on or before ​​February 1, as long as travel is rescheduled in the originally ticketed cabin (any fare class) and between the same cities as originally ticketed.​​Northeast US Winter WeatherTravel Dates: January 29Airports covered: Akron/Canton, OH (CAK); Albany, NY (ALB); Allentown, PA (ABE); Bangor, ME (BGR); Buffalo, NY (BUF); Burlington, VT (BTV); Cleveland, OH (CLE); Elmira, NY (ELM); Erie, PA (ERI); Harrisburg, PA (MDT); Ithaca, NY (ITH); Manchester, NH (MHT); Montréal, QC, CA (YUL); New York-Kennedy, NY (JFK); New York-LaGuardia, NY (LGA); New York/Newark, NJ (EWR); Ottawa, ON, CA (YOW); Philadelphia, PA (PHL); Pittsburgh, NY (PIT); Plattsburgh, NY (PBG); Portland, ME (PWM); Presque Isle, ME (PQI); Quebec City, QB, CA (YQB); Rochester, NY (ROC); State College, PA (SCE); Syracuse, NY (SYR); White Plains, NY (HPN); Wilkes-Barre/Scranton, PA (AVP)The change fee and any difference in fare will be waived for new United flights departing on or before ​​February 1, as long as travel is rescheduled in the originally ticketed cabin (any fare class) and between the same cities as originally ticketed.​​No waivers (yet) from: AlaskaProtect Your TravelsAs we move deeper into winter, these storms are another reminder to book flights with a card that offers solid trip delay and cancellation insurance. One top choice for getting solid mileage earning and trip protection when booking flights is the Chase Sapphire Preferred Card.For more TPG news delivered each morning to your inbox, sign up for our daily newsletter here: https://thepointsguy.com/mailing-list//