There's a domestic travel fare war going on between American and United. Fares from each other's and Delta's hub cities are as low as $125 roundtrip to smaller cities across the nation. Fares on these routes are usually much higher so act fast to get in on these huge price drops.

This sale is unadvertised and fares may jump in price at any time. Book now and take advantage of a 24-hour risk free cancellation policy to think about your plans.

Many routes are available for summer travel and into the fall or winter. United's fares are generally available for travel through mid-November, while American's fares are generally available through mid-February, excluding holiday travel. Travel days and restrictions vary by route so be sure to click on the fare details for more info.

A sample of American Airlines fares include:

Atlanta to Norfolk $125 roundtrip

Houston to Fort Myers $143 roundtrip

Little Rock to Houston $144 roundtrip

Madison to Washington DC $145 roundtrip Regular Economy!

Detroit to Huntsville $145 roundtrip Regular Economy!

Atlanta to South Bend, IN $145 roundtrip

Detroit to Savannah $145 roundtrip

Fayetteville, AR to Newark $146 roundtrip

Atlanta to Springfield, MO $148 roundtrip

Detroit to Little Rock $148 roundtrip

Detroit to Charleston $155 roundtrip

Amarillo to Houston $156 roundtrip

Atlanta to Tulsa $157 roundtrip

Detroit to Burlington $157 roundtrip Regular Economy!

Newark to Des Moines $157 roundtrip

Atlanta to Key West $158 roundtrip

San Francisco to Tucson $174 roundtrip

Oklahoma City to San Francisco $176 roundtrip

San Francisco to San Antonio $176 roundtrip

Fort Smith, AR to Atlanta $176 roundtrip

Houston to San Francisco $180 roundtrip

Burlington to Atlanta $199 roundtrip

A sample of United Airlines fares include:

Minneapolis to Santa Ana $170 roundtrip

Dallas to Fresno $170 roundtrip

Dallas to Palm Springs $170 roundtrip

These fares all work in reverse as well and are in Basic Economy (unless otherwise noted). Only one small personal item is included. The upgrade to a regular economy fare is usually only $25 more each way on American, which is equivalent to a checked bag fee. United's regular economy fares are much higher. Checked bag fees are the same $25 each way for both basic and standard economy, so consider the best fare for you and pack accordingly.

There may be more similar price drops. Check flights from your city to see all of today's current finds.

Header image by Jag_cz via Shutterstock.