Belgium has announced it will accelerate the delivery of surplus Lockheed Martin F-16 fighters to Ukraine. Instead of delivering three flyable F-16s before the end of the year, Brussels will ship 10.

It's unclear how many will be flyable. Previously, Belgian officials explained the first seven secondhand F-16s would include just three airworthy examples. The other four would be broken down for spare parts.

It's good news for Ukraine, but hardly cause for nationwide celebration. The handful of flyable F-16s that should arrive in the coming two months could make good recent F-16 losses. But those shipping-soon Belgian F-16s won't actually grow Ukraine's F-16 fleet by much, if at all.

The dozens of supersonic F-16s in action in Ukraine fly often and fight hard. They shoot down Russian drones and cruise missiles, tangle with Russian warplanes, and lob precision glide bombs at Russian forces on the ground. Russia launched about 2,000 jet-powered drones at Ukraine in September, up from some 350 in June, and F-16s are among the few weapons fast enough to catch them, the Wall Street Journal's editorial board noted. Every 300 flying hours, each jet must go abroad for a lengthy inspection.

The main constraint on the pace of F-16 sorties, besides maintenance demands and the availability of trained pilots, is munitions: running low or out of air-to-air missiles and glide bombs, the F-16s routinely aim their 20-mm guns at Russian targets. But even 20-mm ammunition sometimes runs low.

The busy F-16s and their equally busy pilots need reinforcement. But reinforcements are slow coming. Belgium is only slightly accelerating its F-16 shipments amid reports it will eventually give Ukraine all 53 F-16s it's gradually retiring as new Lockheed Martin F-35 stealth fighters arrive to re-equip the Belgian air force.

Further complicating the picture, Norway's six F-16s, promised in 2023, were still being refurbished in Belgium this spring. Some arrived there in pieces.

Yes, Ukraine got 24 fight-ready F-16s from the Netherlands and most of the 19 Denmark promised. But it's lost five of those jets since 2024. And others are so worn out from relentless flying that they're badly in need of maintenance. The Belgian firm Sabena, which services Ukrainian F-16s, has struggled to keep up, and President Volodymyr Zelenskyy has said about half of the jets spend long stretches abroad for repairs. That slows the return of repaired planes and further squeezes the front-line force.

One wing, too few jets

Donor	F-16s promised	Reached Ukraine	Status
Netherlands	24	24	Complete
Denmark	19	At least 12	Further deliveries due
Norway	6	0	Being refurbished in Belgium
Belgium	53	0	10 by end of 2026, the last in 2029
Total	About 100	At least 36, five since lost	Fewer than 40 in service

In short, it's possible the Ukrainian air force's 107th Aviation Wing, its sole F-16 unit, has fewer than 40 ready-to-fight F-16s. Those 53 Belgian F-16s will help grow the wing, but piecemeal. Ukraine should expect a handful of operational jets from Belgium this year. Under a schedule from May, the last 27, half the total, may not arrive until 2029.

To be clear, additional F-16s support the 107th Aviation Wing. The Netherlands sold 18 of its old F-16s to Romania for a token price in order to equip a training squadron, funded by a consortium of Ukraine's allies, that feeds trained pilots to the 107th Aviation Wing. But these 18 jets aren't available for front-line use. They don't even legally belong to Ukraine.

The delays in supplies of combat-ready F-16s matter because the Ukrainian air force is under stress. Its last few dozen ex-Soviet warplanes, including Mikoyan MiG-29 and Sukhoi Su-27 fighters, are even older and wearier than the ex-European F-16s are. And they've suffered staggering losses in the air and on the ground in nearly 56 months of hard fighting in the wider war.

The air force does have a few ex-French Dassault Mirage 2000s that are at least as capable as the F-16s, but France has donated only a handful of the supersonic jets—and one has crashed. Any further supplies of Mirage 2000s could be complicated by the French presidential election in April 2027. The leading far-right and far-left parties are both friendly toward Russia and hostile to Ukraine.

Some relief is coming, although not quickly. Sweden has pledged 16 surplus JAS-39C/D Gripen fighters to the Ukrainian war effort; the first of these could arrive early next year. Later on, Ukraine also plans to buy 20 newer JAS-39E/Fs. Kyiv has also negotiated to purchase 16 new Rafale fighters from Paris, but the soonest these could arrive is 2028.

For now, F-16s are the main solution to Ukraine's air defense problems. Kyiv surely wishes it had more of them, sooner.

Overnight on 14 and 15 October, the Ukrainian navy fired a clutch of Long Neptune cruise missiles at Borisoglebsk air base in Voronezh, in western Russia some 260 km from the border with Ukraine.

The results were devastating. The ground-launched Neptunes struck the tarmac where six Russian air force Sukhoi Su-34 fighter-bombers were parked nearly wingtip to wingtip in uncovered positions.

Satellite imagery from the morning of 15 October depicted piles of smoldering wreckage. The navy said it hit all six jets. Ukrainian President Volodymyr Zelensky said four Su-34s were destroyed and a further two were damaged. "I thank the warriors of the Ukrainian navy for their precision!" he wrote.

The jets, he said, were loaded with aerial bombs and ready for new strikes on Ukraine. An analyst reading the imagery counted wreckage of two to four aircraft and two empty spots where damaged jets had been moved.

An Airbus Pléiades satellite image from 11 October, four days before the strike, showed the six Su-34s on open aprons. Next to them were structures that the Russian independent outlet Istories said looked like anti-drone nets or their frames. Nets can snag a small drone. A cruise missile goes through.

At roughly $50 million apiece, by the Ukrainian Air Force's estimate, the four destroyed jets alone cost Russia some $200 million. The twin-engine, two-seat, supersonic Su-34 is the Russian air force's best fighter-bomber. Almost every day, Su-34s lob KAB precision glide bombs at Ukrainian troops and civilians.

Satellite images of Borisoglebsk Air Base as of October 15, 08:25 UTC

On the night of October 15, several Su-34 were destroyed at Borisoglebsk Air Base. pic.twitter.com/3ZNBWhU6UD

— AviVector (@avivector) October 15, 2026

In nearly 56 months of hard fighting in Russia's wider war on Ukraine, the Russians have now lost no fewer than 37 Su-34s destroyed, with several more damaged, by open-source counts. Sukhoi continues to deliver new Su-34s in small batches, the latest handed over on 7 October, helping the Russians sustain their overall inventory despite heavy losses.

They've still got plenty of Su-34s, but that doesn't mean the Russians shouldn't worry. As long as they're parking warplanes out in the open within range of Ukraine's best deep strike munitions, those planes are vulnerable to attack. Russia's air defenses are spread too thin to intercept every Ukrainian munition.

Satellite imagery showing the aftermath of a Neptune missile strike on six Su-34 fighter-bombers at Borisoglebsk Airfield.

Coordinates: 51.36315, 42.18560 pic.twitter.com/7TNpxGIaB0

— Dnipro Osint (@GarbuzYe) October 15, 2026

The strike may also hit the Russian air force's training pipeline. Borisoglebsk air base is home to the 160th Aviation Training Regiment. The regiment operates Yakovlev Yak-130 trainers for more basic flight training plus—for more advanced training—front-line combat aircraft including Su-34s, Sukhoi Su-35s, and Sukhoi Su-30s.

Russian bloggers are aghast, according to a round-up of posts on Russian social media by analyst ChrisO_wiki. "How is it that, four years after the start of the Special Military Operation, there are no protective structures for aircraft at airfields located within range of Ukrainian air strikes?" blogger Ramsay wrote. "And where did the billions of rubles allocated for their construction go?"

"Much can be said about the need to build a sufficient number of concrete shelters at all airfields," blogger Vladimir Romanov pointed out. "Reality shows that, to date, sufficient measures have not been taken."

Close parking

Ramsay asked why the Su-34s were concentrated in one area, apparently so that ground crews could quickly service all of them with a single ground power unit, a mobile generator that starts an aircraft's systems before flight. "How is it that the APA, a utilitarian piece of equipment, has become so scarce that it forces an entire group of combat aircraft to be parked in a single area, making them an ideal target for attacks?"

The best defense is an active one, however, the Fighterbomber channel stressed. "Protecting aircraft by the usual method of moving them out of the line of fire at such ranges from long-range strike systems won’t work here; the only way to defend against them is with a full-scale, echeloned air defense system—both ground-based and airborne."

1/ Russian warbloggers are furious at the news that a Ukrainian missile has destroyed between 4 and 6 Su-34 jets on the ground at a Russian airfield. How is it possible, they ask, that the Russian air force is still parking aircraft close together without protection? pic.twitter.com/BrTvfCMRfH

— ChrisO_wiki (@ChrisO_wiki) October 15, 2026

Ukrainian planners know this. Which is why, for more than a year now, they've been systematically striking Russian radars, surface-to-air missile batteries, and mobile air defense systems. By March, Ukrainian forces were “collaps[ing] the layered defensive architecture that the Russian integrated air defence doctrine depends upon to function,” according to an in-depth investigation by Tochnyi.info.

The strikes on Russian air defenses—at least 492 of them between June and early March—are part of a carefully scripted plan. Destroying the right air defenses faster than the Russians can replace them has the effect of “facilitating strikes on more critical targets deep within Russian territory,” Tochnyi.info explained.

The critical targets include air bases such as Borisoglebsk and the expensive warplanes parked on its tarmac.