Cheapest Airlines for Military: Bags, Fees and Fare Rules

The cheapest airline for a military traveler is rarely the one with the lowest headline fare. It is the one with the lowest total after bag fees, change fees and seat charges, and that is where military benefits do most of their work. Southwest, Allegiant, Delta, American and United each treat service members differently, so the right choice depends on how many bags you carry, how flexible you need to be, and whether your orders might change.

The comparison below uses Southwest’s own military page where available and independent reporting for the rest. Details differ between sources and change over time, so treat the table as a starting point and confirm on the airline’s site before you book.

Quick answer

• For heavy luggage and flexible orders, Southwest is the best-documented option because its own page lists military fares, baggage rules and refunds when orders conflict.
• For a budget carrier with a military bag perk, Allegiant is described by reporting as waiving checked-bag fees for service members and dependents on the same itinerary, without a fare discount.
• Delta, American and United are reported to give military members several free checked bags and, in some cases, phone-booked fare discounts.
• If you carry one backpack, the bag perks are worth little and the lowest public fare usually wins.
• Always compare total cost, not the lowest fare shown in search results.

Airline-by-airline comparison

How to decide with real numbers

The decision is easiest if you convert everything to a trip total. Take a round trip with two checked bags each way. On an airline that charges for each bag, that is four bag fees. On an airline that waives military bag fees, that number is zero. If the public fare difference between the two airlines is smaller than your total bag fees, the airline with the bag waiver is cheaper. If you check no bags, the comparison collapses to the lowest fare.

1. List the airlines that fly your route on your dates.
2. Write each public fare, then add expected bag fees for the bags you really carry.
3. Subtract nothing for a military discount until you have a written quote. Phone discounts are not guaranteed.
4. Add the value of flexibility. If your orders could change, a refundable fare is worth a premium.
5. Pick the lowest total with acceptable change terms.

Southwest: the best-documented program

Southwest’s military travel page states that active-duty personnel, including reservists, Guard and Coast Guard members with active orders and academy cadets and midshipmen, and their authorized dependents are eligible for military fares. It says those fares are not available online and must be booked through the airline’s phone line or at a ticket counter. It also says active-duty members are not charged excess, oversize or overweight baggage fees and that service members who receive orders conflicting with personal travel get refunds for themselves and traveling companions regardless of the original ticket type. For travelers who want predictable rules in writing, that clarity is valuable.

Where Southwest may not be cheapest

Southwest does not serve every airport, and its military fare may cost more than a restricted sale fare on another carrier. If you are traveling light, compare it with a low-cost airline before committing.

Allegiant: a bag perk without a fare discount

Allegiant is a low-cost carrier that flies from smaller airports to leisure destinations. Reporting describes its military program as a set of benefits rather than a ticket discount: free checked bags for military members and dependents traveling together, carry-on and personal item allowances, and priority boarding. Because Allegiant normally charges for most extras, the bag perk can make a low base fare much more attractive for a service member. The tradeoffs are limited schedules and routes. If a flight is cancelled, there may be few alternatives the same day.

Delta, American and United

These legacy carriers have broad networks and many daily flights, which helps when you cannot afford a missed connection. Independent guides describe generous bag allowances for service members traveling on orders and a smaller allowance for personal travel, plus phone-booked fare discounts that are not published online. Because details vary by source, call or read the airline’s own military page, and ask that the bag allowance and weight limit be confirmed in your booking record.

Budget carriers without a known military program

Several other low-fare airlines operate in the United States, and not all have clear military policies. If an airline does not publish a military benefit, assume you will pay standard fees unless it states otherwise, and compare accordingly. Do not rely on a coupon site’s claim that a budget carrier offers a military discount unless the airline’s own page says so.

Which airline fits which traveler

Questions to ask before you book

1. How many bags are included for my kind of travel? The answer is often different for orders and for leisure trips.
2. What are the size and weight limits? A bag that is one pound over can still draw a fee on some airlines.
3. What happens if my orders change? Ask about refund or credit rules in writing.
4. Do carry-on and seat fees still apply? Budget carriers often charge for those even when checked bags are free.
5. What ID is accepted at check-in? Confirm that the card you carry is on the airline’s list.
6. Do my dependents qualify when traveling without me? The answer is frequently no for bag benefits.

A comparison method that avoids guesswork

Create a short table on paper. For each airline, write four numbers: the public fare, the cost of every bag you intend to carry both ways, the cost of any seat or carry-on charge, and a rough value for flexibility. Add the first three. The airline with the lowest total is the cheapest on paper. Then apply flexibility: if your orders are likely to change, a slightly higher total with a good change policy can be the cheaper choice in practice, because it protects you from losing the whole ticket.

This method is also how you spot misleading comparisons. A site that ranks airlines purely by lowest fare does not know how many bags you carry or whether you have a military bag waiver. Your own total will always be more accurate than a generic ranking.

Seat, carry-on and boarding extras

Low-cost carriers separate many items that larger airlines include in a base fare. Carry-on bags, seat selection and even printing a boarding pass at the airport may carry charges. Military bag waivers usually cover checked bags and sometimes carry-ons, but not seats. Read the airline’s military page closely to see exactly what is covered, and do not assume a benefit extends beyond the wording. Priority boarding for service members, where offered, is a courtesy that helps you secure overhead space, which matters if you are carrying a bag on board to avoid the checked-bag process altogether.

Uniform and ID reminders

Whether or not you travel in uniform, keep your military identification accessible. Airport staff and gate agents need to see the card to apply any benefit, and those who check in online may still need to show ID at the counter to have the waiver recorded on the booking.

Stacking and timing

• Bag waivers combine with sale fares on the airlines that offer them, because they are tied to your ID, not the fare.
• Military fares and promotional fares are usually alternatives, so choose the better one rather than hoping for both.
• Airline credit-card benefits, such as a free checked bag for cardholders, may overlap with military bag waivers, so you will not necessarily gain extra bags.
• Book earlier for holidays and summer leave; fares in those periods climb quickly.
• Watch the rules about dependents: the bag benefit often requires the service member on the same itinerary.

Common surprises at the airport

Service members who expect a benefit to apply automatically are sometimes caught out. The most common surprises are a bag over the stated weight, a second bag counted differently on a connecting itinerary with a partner airline, and a dependent whose ticket was booked separately from the member’s. If your trip includes a codeshare flight operated by another airline, ask which carrier’s baggage rules apply, because the operating airline sometimes decides. Another surprise is a basic economy fare that restricts changes even when a military bag waiver applies. The bag benefit and the fare rules are two separate things, so read both.

It also helps to arrive a little earlier than usual when you plan to use a benefit that needs manual handling at the counter, since agents may have to enter the waiver by hand. Keep your booking confirmation, military ID and any orders in one place so the process is quick.

Coupon and promo code mistakes to avoid

• Believing there is a hidden military code. Airlines apply military benefits through ID checks and phone bookings.
• Choosing by headline fare. Bag fees and change fees can erase a low fare.
• Ignoring ID requirements. If you do not carry the right card, the perk may not apply at check-in.
• Paying for unverified discount lists. Many are copies of each other and out of date.
• Assuming veterans get the active-duty perks. Most bag and fare benefits are for active-duty members.
• Using sharing sites that ask for ID photos. Only verify through the airline or a named platform.

How we researched this

This guide is based on the brand’s official pages and independent reporting named below; offers change, so confirm on the brand’s site or app before ordering. We do not publish unverified codes.

Sources

• Southwest Airlines military travel and benefits page
• Upgraded Points, military flight discounts sorted by airline
• NerdWallet, flights with military discounts and best airline for veterans
• The Military Wallet, military discount flights by airline
• Airline-baggage-fees.com, Allegiant military baggage policy

Frequently Asked Questions

Which airline is cheapest for military travelers?

It depends on your bags and flexibility. Airlines that waive bag fees for service members, such as Southwest and, per reporting, Allegiant, often come out cheapest for heavy luggage, while the lowest public fare wins when you travel light.

Does Allegiant give a military fare discount?

Reporting says no, describing bag and boarding benefits instead. Confirm the current terms with Allegiant before you book.

Does Southwest charge military members for bags?

Its own page says active-duty members are not charged excess, oversize or overweight fees, within the stated size and weight limits. Dependents traveling without the member pay normal charges.

Can retirees and veterans use these perks?

Mostly no for fare discounts, which are tied to active-duty status. Some programs extend limited benefits, so ask each airline.

Are military fares refundable?

Not automatically. Southwest describes refunds when orders conflict with personal travel, but fare rules vary, so ask for the specific refund terms before paying.

Should I call or book online?

Call when the airline sells military fares by phone, as Southwest does. Otherwise book online at the best public fare and claim the bag benefit at check-in with your ID.

Do dependents get the same benefits?

Dependents can often buy military fares, but bag benefits usually apply only when they travel with the service member or on the same orders.

Last updated: October 2026